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Lithium ion battery

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https://www.readbyqxmd.com/read/29161051/a-new-avenue-for-limiting-degradation-in-nanoli4ti5o12-for-ultra-fast-charge-lithium-ion-batteries-hybrid-polymer-inorganic-particles
#1
Jean-Christophe Daigle, Yuichiro Asakawa, Mélanie Beaupré, René Vieillette, Dharminder Laul, Michel L Trudeau, Karim Zaghib
Lithium titanium oxide (Li4Ti5O12)-based cells are a very promising battery technology for ultra-fast charge-discharge and long-life cycle batteries. However, surface reactivity of lithium titanium oxide is still a problem in presence of organic electrolyte which may cause expansion of the pouch cell. In this study, we report on the development of a simple and economical ''grafting onto'' method for forming hybrid polymer-Li4Ti15O12 nanoparticles which can be successfully applied in lithium-ion batteries. This method utilizes a low-cost and scalable hydrophobic polymer which is required for industrial implantation...
November 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/29159352/improved-li-storage-performance-with-pedot-decorated-mno2-nanoboxes
#2
Xiaoqiao Chen, Zhiguang Cao, Lidan Xing, Youhao Liao, Yongcai Qiu, Weishan Li
In this paper, MnO2 nanoboxes coated with poly(3,4-ethylenedioxythiophene) film (denoted as MnO2@PEDOT) are investigated as an anode material in lithium-ion batteries. The MnO2 nanoboxes are developed through the surface chemical oxidation decomposition of MnCO3 cubes and the subsequent removal of their remaining cores. PEDOT is coated on the surface of MnO2 nanoboxes via in situ polymerization of 3,4-ethylenedioxythiophene. The charge-discharge tests demonstrate that this special configuration endows the resulting MnO2@PEDOT with remarkable electrochemical performances, that is a reversible capacity of 628 mA h g(-1) after 850 cycles at a current density of 1000 mA g(-1) and a rate capacity of 367 mA h g(-1) at 3000 mA g(-1)...
November 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/29159343/an-insight-into-intrinsic-interfacial-properties-between-li-metals-and-li10gep2s12-solid-electrolytes
#3
Bingbing Chen, Jiangwei Ju, Jun Ma, Jianjun Zhang, Ruijuan Xiao, Guanglei Cui, Liquan Chen
Density functional theory simulations and experimental studies were performed to investigate the interfacial properties, including lithium ion migration kinetics, between lithium metal anode and solid electrolyte Li10GeP2S12(LGPS). The LGPS[001] plane was chosen as the studied surface because the easiest Li(+) migration pathway is along this direction. The electronic structure of the surface states indicated that the electrochemical stability was reduced at both the PS4- and GeS4-teminated surfaces. For the interface cases, the equilibrium interfacial structures of lithium metal against the PS4-terminated LGPS[001] surface (Li/PS4-LGPS) and the GeS4-terminated LGPS[001] surface (Li/GeS4-LGPS) were revealed based on the structural relaxation and adhesion energy analysis...
November 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29155556/anthracite-derived-dual-phase-carbon-coated-li3v2-po4-3-as-high-performance-cathode-material-for-lithium-ion-batteries
#4
Xiao-Kai Ding, Lu-Lu Zhang, Xue-Lin Yang, Hui Fang, Ying-Xian Zhou, Ji-Qing Wang, Di Ma
In this study, low cost anthracite derived dual-phase carbon coated Li3V2(PO4)3 composites have been successfully prepared via a traditional solid-phase method. XRD results show that the as-prepared samples have high crystallinity and anthracite-introducing has no influence on the LVP crystal structure. The LVP/C particles are uniformly covered with a dual-phase carbon layer composed of amorphous carbon and graphitic carbon. The effect of the amount of anthracite on the battery performance of LVP as a cathode material has also been studied...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29154099/comparison-analysis-on-the-thermal-runaway-of-lithium-ion-battery-under-two-heating-modes
#5
Tangqin Wu, Haodong Chen, Qingsong Wang, Jinhua Sun
The thermal stability evaluation of materials in a soft-pack commercial cell is tested using C80 calorimeter, including anode, cathode, separator and full cell (mixing of the three materials including additional electrolyte). Thermal runaway characteristic of the commercial cell is tested on the accelerating rate calorimeter (ARC) with two heating modes, including internal heating mode and external heating mode. The results show that the thermal stability of internal material for tested cell follows the below order: anode<separator<cathode...
November 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29149567/preparation-of-lithium-titanate-reduced-graphene-oxide-composites-with-3d-fishnet-like-conductive-structure-via-a-gas-foaming-method-for-high-rate-lithium-ion-batteries
#6
Tao Meng, Fenyun Yi, Honghong Cheng, Junnan Hao, Dong Shu, Shixu Zhao, Chun He, Xiaona Song, Fan Zhang
Using ammonium chloride (NH4Cl) as the pore-forming agent, three-dimensional (3D) "fishnet-like" lithium titanate/reduced graphene oxide (LTO/G) composites with hierarchical porous structure are prepared via a gas-foaming method. SEM and TEM images show that in the composite prepared with the NH4Cl concentration of 1 mg mL-1 (1-LTO/G), LTO particles with sizes of 50~100 nm disperse homogeneously on the 3D "fishnet-like" graphene sheets. The nitrogen-sorption analyses reveal the existence of micro/mesopores, which is attributed to the introduction of NH4Cl into the gap between the graphene sheets that further decomposes into gases and produces hierarchical pores during the thermal treatment process...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148727/substrate-assisted-in-situ-confinement-pyrolysis-of-zeolitic-imidazolate-frameworks-to-nitrogen-doped-hierarchical-porous-carbon-nanoframes-with-superior-lithium-storage
#7
Wei Tian, Jialiang Liu, Yixian Wang, Jingyan Liu, Yanpeng Li, Mingbo Wu
Porous carbons generated from the direct pyrolysis of metal organic frameworks (MOFs) have showed great potential as a kind of promising electrode materials for lithium-ion batteries (LIBs). However, several common drawbacks, such as the inevitable structural damage during carbonization process and intrinsic micropore-dominated feature of MOFs-derived products, largely impede the exposure of active sites and mass transfer, thus usually resulting in inferior electrochemical performances. In this work, an effective and controllable approach was reported to construct nitrogen-doped hierarchical porous carbon nanoframes (N-HPCFs) through in situ pyrolysis transformation of small-sized zeolitic imidazolate frameworks (ZIFs) that are in advance combined with a two-dimensional substrate templated from g-C3N4...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148705/li-desolvation-dictating-lithium-ion-battery-low-temperature-performances
#8
Qiuyan Li, Dongping Lu, Jianming Zheng, Shuhong Jiao, Langli Luo, Chongmin Wang, Kang Xu, Ji-Guang Zhang, Wu Xu
Lithium (Li) ion battery (LIB) has penetrated almost every aspects of human life, from portable electronics, vehicles to grids, and its operation stability in extreme environments becomes increasingly important. Among these, sub-zero temperature presents a kinetic challenge to the electrochemical reactions required to deliver the stored energy. In this work, we attempted to identify the rate-determining process for Li+ migration under such low temperatures, so that an optimum electrolyte formulation could be designed to maximize the energy output...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148701/metal-organic-framework-derived-metal-oxide-embedded-in-nitrogen-doped-graphene-network-for-high-performance-lithium-ion-batteries
#9
Zhu-Yin Sui, Pei-Ying Zhang, Meng-Ying Xu, Yuwen Liu, Zhi-Xiang Wei, Bao-Hang Han
Metal-organic frameworks (MOFs) are hybrid inorganic-organic materials that can be used as effective precursors to prepare various functional nanomaterials for energy-related applications. Nevertheless, most MOF-derived metal oxides exhibit low electrical conductivity and mechanical strain. These characteristics limit their electrochemical performance and hamper their practical application. Herein, we report a rational strategy for enhancing the lithium storage performance of MOF-derived metal oxide. The hierarchically porous Co3O4@NGN is successfully prepared by embedding ZIF-67-derived Co3O4 particles in a nitrogen-doped graphene network (NGN)...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148697/synthesis-of-hierarchical-sisal-like-v2o5-with-exposed-stable-001-facets-as-long-life-cathode-materials-for-advanced-lithium-ion-batteries
#10
Naiteng Wu, Wuzhou Du, Guilong Liu, Zhan Zhou, Hong-Ru Fu, Qianqian Tang, Xianming Liu, Yan-Bing He
Vanadium pentoxide (V2O5) is considered a promising cathode material for advanced lithium-ion batteries due to its high specific capacity and low cost. However, the application of V2O5-based electrodes has been hindered by their inferior conductivity, cycling stability and power performance. Herein, hierarchical sisal-like V2O5 microstructures consisting of primary one-dimension (1D) nanobelt with [001] facets orientation growth and rich oxygen vacancies are synthesized through a facile hydrothermal process using polyoxyethylene-20-cetyl-ether as surface control agent, and followed by calcination...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29146973/graphene-balls-for-lithium-rechargeable-batteries-with-fast-charging-and-high-volumetric-energy-densities
#11
In Hyuk Son, Jong Hwan Park, Seongyong Park, Kwangjin Park, Sangil Han, Jaeho Shin, Seok-Gwang Doo, Yunil Hwang, Hyuk Chang, Jang Wook Choi
Improving one property without sacrificing others is challenging for lithium-ion batteries due to the trade-off nature among key parameters. Here we report a chemical vapor deposition process to grow a graphene-silica assembly, called a graphene ball. Its hierarchical three-dimensional structure with the silicon oxide nanoparticle center allows even 1 wt% graphene ball to be uniformly coated onto a nickel-rich layered cathode via scalable Nobilta milling. The graphene-ball coating improves cycle life and fast charging capability by suppressing detrimental side reactions and providing efficient conductive pathways...
November 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29144142/nanoscale-zirconium-abundant-surface-layers-on-lithium-and-manganese-rich-layered-oxides-for-high-rate-lithium-ion-batteries
#12
Juhyeon Ahn, Jong Hak Kim, Byung Won Cho, Kyung Yoon Chung, Sangryun Kim, Jang Wook Choi, Si Hyoung Oh
Battery performance, such as the rate capability and cycle stability of lithium transition metal oxides, is strongly correlated with the surface properties of active particles. For lithium-rich layered oxides, transition metal segregation in the initial state and migration upon cycling leads to a significant structural rearrangement, which eventually degrades the electrode performance. Here, we show that a fine-tuning of surface chemistry on the particular crystal facet can facilitate ionic diffusion and thus improve the rate capability dramatically, delivering a specific capacity of ∼110 mAh g(-1) at 30C...
November 16, 2017: Nano Letters
https://www.readbyqxmd.com/read/29144139/a-multiscale-simulation-platform-linking-lithium-ion-battery-electrode-fabrication-process-with-performance-at-the-cell-level
#13
Alain Ngandjong, Alexis Rucci, Mariem Maiza, Garima Shukla, Jorge Gabriel Vazquez-Arenas, Alejandro A Franco
A novel multiscale modeling platform is proposed to demonstrate the importance of particle assembly during battery electrode fabrication by showing its effect on battery performance. For the first time, a discretized 3D electrode resulting from the simulation of its fabrication, has been incorporated within a 3D continuum performance model. The study used LiNiMnCoO2 as active material where effect of change of electrode formulation is explored for three cases, namely 85:15, 90:10, and 95:5, as ratios between active material and carbon-binder domains...
November 16, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29138779/ion-solvation-structure-and-battery-electrode-characteristics-of-nonflammable-organic-electrolytes-based-on-tris-trifluoroethyl-phosphate-dissolving-lithium-salts
#14
Yanko Marinov Todorov, Kenta Fujii, Nobuko Yoshimoto, Daisuke Hirayama, Masahiro Aoki, Hideyuki Mimura, Masayuki Morita
The structure and properties of lithium salt solutions based on tris(2,2,2-trifluoroethyl)phosphate (TFEP) solvent have been studied to design a safer electrolyte system for large-sized lithium-ion battery applications. Influences of the ionic structure on the polarization behavior of the LiCoO2 (LCO) positive electrode were investigated. The ionic conductivity and viscosity of the solution consisting of lithium salts dissolved in TFEP, LiX/TFEP (X = PF6, BF4 and TFSA) (TFSA = (CF3SO2)2N), were measured. The results suggest that the ion-solvation structure greatly depends on the anionic species in the salt...
November 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29137195/three-dimensional-zno-hierarchical-nanostructures-solution-phase-synthesis-and-applications
#15
REVIEW
Xiaoliang Wang, Mashkoor Ahmad, Hongyu Sun
Zinc oxide (ZnO) nanostructures have been studied extensively in the past 20 years due to their novel electronic, photonic, mechanical and electrochemical properties. Recently, more attention has been paid to assemble nanoscale building blocks into three-dimensional (3D) complex hierarchical structures, which not only inherit the excellent properties of the single building blocks but also provide potential applications in the bottom-up fabrication of functional devices. This review article focuses on 3D ZnO hierarchical nanostructures, and summarizes major advances in the solution phase synthesis, applications in environment, and electrical/electrochemical devices...
November 13, 2017: Materials
https://www.readbyqxmd.com/read/29135065/a-simple-pre-lithiation-strategy-to-build-high-rate-and-long-life-lithium-ion-battery-with-improved-low-temperature-performance
#16
Yonggang Wang, Yao Liu, Bingchang Yang, Xiaoli Dong, Yongyao Xia
Lithium-ion batteries (LIBs) are being used to power the commercial electric vehicles (EVs). However, the charge/discharge rate and life of current LIBs still cannot satisfy the further development of EVs. Furthermore, the poor low temperature performance of LIBs limits their application in cold climates and high altitude areas. Herein, a simple pre-lithiation method is developed to fabricate a new LIB. In this strategy, a Li3V2(PO4)3 cathode and a pristine hard carbon anode are used to form a primary cell, and the initial Li+ extraction from Li3V2(PO4)3 is used to pre-lithiate the hard carbon...
November 14, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29134699/synthesis-and-properties-of-a-photopatternable-lithium-ion-conducting-solid-electrolyte
#17
Christopher S Choi, Jonathan Lau, Janet Hur, Leland Smith, Chunlei Wang, Bruce Dunn
One of the important considerations for the development of on-chip batteries is the need to photopattern the solid electrolyte directly on electrodes. Herein, the photopatterning of a lithium-ion conducting solid electrolyte is demonstrated by modifying a well-known negative photoresist, SU-8, with LiClO4 . The resulting material exhibits a room temperature ionic conductivity of 52 µS cm(-1) with a wide electrochemical window (>5 V). Half-cell galvanostatic testing of 3 µm thin films spin-coated on amorphous silicon validates its use for on-chip energy-storage applications...
November 14, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29131962/intercalation-and-deintercalation-of-lithium-at-the-ionic-liquid-graphite-0001-interface
#18
Florian Buchner, Jihyun Kim, Christiane Adler, Maral Bozorgchenani, Joachim Bansmann, R Jürgen Behm
The intercalation and deintercalation of lithium (Li) into / out of graphite(0001), which is a highly important process in Li-ion batteries, was investigated under ultrahigh vacuum conditions as a function of temperature, employing X-ray and ultraviolet photoelectron spectroscopy. Both the up-shifts of the core-level binding energy and the lowering of the work function ΔΦ reveal that heating of a monolayer of the battery-relevant ionic liquid (IL) 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide ([BMP](+)[TFSI](-)) adsorbed on lithiated graphite at 80 K to >230 K facilitates an accumulation of partially charged Li(δ+) atoms at the IL-graphite(0001) interface...
November 15, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29131650/revealing-the-solvation-structure-and-dynamics-of-carbonate-electrolytes-in-lithium-ion-batteries-by-two-dimensional-infrared-spectrum-modeling
#19
Chungwen Liang, Kyungwon Kwak, Minhaeng Cho
Carbonate electrolytes in lithium-ion batteries play a crucial role in conducting lithium ions between two electrodes. Mixed solvent electrolytes consisting of linear and cyclic carbonates are commonly used in commercial lithium-ion batteries. To understand how the linear and cyclic carbonates introduce different solvation structures and dynamics, we performed molecular dynamics simulations of two representative electrolyte systems containing either linear or cyclic carbonate solvents. We then modeled their two-dimensional infrared (2DIR) spectra of the carbonyl stretching mode of these carbonate molecules...
November 14, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29131566/new-class-of-lagp-based-solid-polymer-composite-electrolyte-for-efficient-and-safe-solid-state-lithium-batteries
#20
Qingpeng Guo, Yu Han, Hui Wang, Shizhao Xiong, Yujie Li, Shuangke Liu, Kai Xie
Inorganic solid electrolytes (SEs) possess substantial safety and electrochemical stability, which make them as key components of safe rechargeable solid-state Li batteries with high energy density. However, complicated integrally molding process and poor wettability between SEs and active materials are the most challenging barriers for the application of SEs. In this regard, we explore composite SEs of the active ceramic Li1+xAlxGe2-x(PO4)3 (LAGP) as the main medium for ion conduction and the polymer P(VDF-HFP) as a matrix...
November 21, 2017: ACS Applied Materials & Interfaces
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