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Lithium ion battery

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https://www.readbyqxmd.com/read/28231422/adiponitrile-litfsi-solution-as-alkylcarbonate-free-electrolyte-for-lto-nmc-li-ion-batteries
#1
Douaa Farhat, Fouad Ghamouss, Julia Maibach, Kristina Edström, Daniel Lemordant
Recently, dinitriles (NC(CH2)nCN) and especially adiponitrile (ADN, n=4) have attracted the attention as secure electrolyte solvents due to their chemical stability, high boiling points, high flash points and low vapor pressure. The good solvating properties of ADN toward lithium salts and its high electrochemical stability (~ 6V vs. Li/Li+) make it suitable for safer Li-ions cells without performances loss. In this study, ADN is used as a single electrolyte solvent with lithium bis(trimethylsulfonyl)imide (LiTFSI)...
February 23, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28231004/ionic-intercalation-in-2d-van-der-waals-materials-in-situ-characterization-and-electrochemical-control-of-the-anisotropic-thermal-conductivity-of-black-phosphorus
#2
Joon Sang Kang, Ming Ke, Yongjie Hu
Two-dimensional van der Waals materials have shown novel fundamental properties and promise for wide applications. Here, we reported, for the first time, an experimental demonstration of the in-situ characterization and control of the anisotropic thermal conductivity of black phosphorus. We develop a novel platform based on lithium ion batteries that integrates ultrafast optical spectroscopy and electrochemical control to investigate the interactions between lithium ions and the lattices of the black phosphorus electrode...
February 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28230537/core-shell-znco2o4-tio2-nanowall-array-as-an-anode-for-li-ion-batteries
#3
Wei Shi, Haitao Zhao, Bingan Lu
In this paper, ZnCo2O4 nanowall arrays were firstly obtained through self-assembly followed by calcination. Then atomic layer deposition was used to fabricate core-shell ZnCo2O4@TiO2 nanowall arrays (NWAs) as anode materials for lithium ion batteries (LIBs). The hierarchical nanowall array nanostructure with fast ion diffusion and electron transport at electrode/electrolyte interface, while the shell of TiO2 with excellent chemical stability can protect the ZnCo2O4 nanowall arrays from volume expansion during charge and discharge processes...
February 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28230376/facet-dependent-thermal-instability-in-licoo2
#4
Soroosh Sharifi-Asl, Fernando A Soto, Anmin Nie, Yifei Yuan, Hasti Asayesh-Ardakani, Tara Foroozan, Vitaliy Yurkiv, Boao Song, Farzad Mashayek, Robert F Klie, Khalil Amine, Jun Lu, Perla B Balbuena, Reza Shahbazian-Yassar
Thermal runaways triggered by the oxygen release from oxide cathode materials pose a major safety concern for widespread application of lithium ion batteries. Utilizing in-situ aberration-corrected scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) at high temperatures, we show that oxygen release from LixCoO2 cathode crystals is occurring at the surface of particles. We correlated this local oxygen evolution from the LixCoO2 structure with local phase transitions spanning from layered to spinel and then to rock salt structure upon exposure to elevated temperatures...
February 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28229488/ultrafast-highly-reversible-and-cycle-stable-lithium-storage-boosted-by-pseudocapacitance-in-sn-based-alloying-anodes
#5
Yinzhu Jiang, Yong Li, Peng Zhou, Zhenyun Lan, Yunhao Lu, Chen Wu, Mi Yan
Boosting power density is one of the primary challenges that current lithium ion batteries face. Alloying anodes that possess suitable potential windows stand at the forefront in pursuing ultrafast and highly reversible lithium storage to achieve high power/energy lithium ion batteries. Herein, ultrafast lithium storage in Sn-based nanocomposite anodes is demonstrated, which is boosted by pseudocapacitance benefitting from a high fraction of highly interconnected interfaces of Fe/Sn/Li2 O. By tailoring the voltage window in the range of 0...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28228169/characterization-of-sulfur-and-nanostructured-sulfur-battery-cathodes-in-electron-microscopy-without-sublimation-artifacts
#6
Barnaby D A Levin, Michael J Zachman, Jörg G Werner, Ritu Sahore, Kayla X Nguyen, Yimo Han, Baoquan Xie, Lin Ma, Lynden A Archer, Emmanuel P Giannelis, Ulrich Wiesner, Lena F Kourkoutis, David A Muller
Lithium sulfur (Li-S) batteries have the potential to provide higher energy storage density at lower cost than conventional lithium ion batteries. A key challenge for Li-S batteries is the loss of sulfur to the electrolyte during cycling. This loss can be mitigated by sequestering the sulfur in nanostructured carbon-sulfur composites. The nanoscale characterization of the sulfur distribution within these complex nanostructured electrodes is normally performed by electron microscopy, but sulfur sublimates and redistributes in the high-vacuum conditions of conventional electron microscopes...
February 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28225556/nb-doped-rutile-tio2-mesocrystals-with-enhanced-lithium-storage-properties-for-lithium-ion-battery
#7
Mingdeng Wei, Tongbin Lin, Weifeng Zhang, Nae-Lih Wu
A homogeneous Nb-doped rutile TiO2 mesocrystal material was synthesized successfully via a facile hydrothermal route. The incorporation of Nb5+ not only promotes the crystallization for the building subunits of the rutile TiO2 mesocrystal but also improves the electrochemical performance at higher current rates. For instance, a capacity of 96.3 mA h g-1 at a current density as high as 40 C and an excellent long-term cycling stability with a capacity loss of ca. 0.006% per cycle at 5 C can be achieved when an appropriate amount of Nb5+ was doped into rutile TiO2 mesocrystal...
February 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28224685/bubble-sheet-like-interface-design-with-an-ultrastable-solid-electrolyte-layer-for-high-performance-dual-ion-batteries
#8
Panpan Qin, Meng Wang, Na Li, Haili Zhu, Xuan Ding, Yongbing Tang
In this work, a bubble-sheet-like hollow interface design on Al foil anode to improve the cycling stability and rate performance of aluminum anode based dual-ion battery is reported, in which, a carbon-coated hollow aluminum anode is used as both anode materials and current collector. This anode structure can guide the alloying position inside the hollow nanospheres, and also confine the alloy sizes within the hollow nanospheres, resulting in significantly restricted volumetric expansion and ultrastable solid electrolyte interface (SEI)...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221752/a-superior-thermal-stable-and-non-flammable-porous-polybenzimidazole-membrane-with-high-wettability-for-high-power-lithium-ion-batteries
#9
Dan Li, Dingqin Shi, Yonggao Xia, Lin Qiao, Xianfeng Li, Huamin Zhang
Separators with high security, reliability and rate capacity are in urgent need for the advancement of high power lithium-ion batteries. The currently used porous polyolefin membranes are critically hindered by their low thermal stability and poor electrolyte wettability, which further lead to low rate capacity. Here we present a novel promising porous polybenzimidazole (PBI) membrane with super high thermal stability and electrolyte wettability. The rigid structure and functional groups in the PBI chain enable membranes to be stable at temperature as high as 400 ℃, and the unique flame resistance of PBI could ensure the high security of a battery as well...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28221711/ion-conductive-properties-of-a-polymer-electrolyte-based-on-ethylene-carbonate-ethylene-oxide-random-copolymer
#10
Takashi Morioka, Koji Nakano, Yoichi Tominaga
A random copolymer of ethylene oxide with CO2 , namely, poly(ethylene carbonate/ethylene oxide) (P(EC/EO)), has been synthesized as a novel candidate for polymer electrolytes. Electrolyte composed of P(EC/EO) and lithium bis(fluorosulfonyl)imide has an ionic conductivity of 0.48 mS cm(-1) and a Li transference number (t + ) of 0.66 at 60 °C. To study ion-conductive behavior of P(EC/EO)-based electrolytes, the Fourier transform infrared (FT-IR) technique is used to analyze the interactions between Li(+) and functional groups of the copolymer...
February 21, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28221016/preparation-and-rate-capability-of-carbon-coated-lini1-3co1-3mn1-3o2-as-cathode-material-in-lithium-ion-batteries
#11
Chaofan Yang, Xiaosong Zhang, Mengyi Huang, Junjie Huang, Zebo Fang
LiNi1/3Co1/3Mn1/3O2 (NCM) is regarded as a promising material for next-generation lithium ion batteries due to the high capacity, but its practical applications are limited by the poor electronic conductivity. Here, a one-step method is used to prepare carbon coated LiNi1/3Co1/3Mn1/3O2 (NCM/C) by applying active carbon as reaction matrix. TEM shows LiNi1/3Co1/3Mn1/3O2 particles are homogeneously coated by carbon with a thickness about 10 nm. NCM/C delivers the discharge capacity of 191.2 mAh g-1 at 0.5 C (85 mA g-1) with a columbic efficiency of 91...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28221009/synthesis-and-exploration-of-ladder-structured-large-aromatic-dianhydrides-as-organic-cathodes-for-rechargeable-lithium-batteries
#12
Qichun Zhang, Jian Xie, Wangqiao Chen, Zilong Wang, Choo Wei Jie Kenneth Choo Wei Jie, Ming Liu
Comparing to anode materials in Li-ion batteries, the research on cathode materials is far behind and their capacities are much smaller. Thus, in order to address these issues, we believe that organic conjugated materials could be a solution. In this study, we demonstrate two non-polymeric dianhydrides with large aromatic structures: NDA-4N (naphthalenetetracarboxylicdianhydride with four nitrogen atoms) and PDA-4N (perylenetetracarboxylicdianhydride with four nitrogen atoms). Their electrochemical properties have been investigated between 2...
February 21, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28220165/new-insights-into-the-electroreduction-of-ethylene-sulfite-as-an-electrolyte-additive-for-facilitating-solid-electrolyte-interphase-formation-in-lithium-ion-batteries
#13
Youmin Sun, Yixuan Wang
To help understand the solid electrolyte interphase (SEI) formation facilitated by electrolyte additives of lithium-ion batteries (LIBs) the supermolecular clusters [(ES)Li(+)(PC)m](PC)n (m = 1-2; n = 0, 6 and 9) were used to investigate the electroreductive decompositions of the electrolyte additive ethylene sulfite (ES) as well as the solvent propylene carbonate (PC) with density functional theory. The results show that ES can be reduced prior to PC, resulting in a reduction precursor that will then undergo a ring opening decomposition to yield a radical anion...
February 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28218513/enhancing-sodium-ion-storage-behaviors-in-tinb2o7-by-mechanical-ball-milling
#14
Yangyang Huang, Xiang Li, Jiahuan Luo, Kun Wang, Qin Zhang, Yuegang Qiu, Shixiong Sun, Shantang Liu, Jiantao Han, Yunhui Huang
Sodium-ion batteries (SIBs) have shown extensive prospect as alternative rechargeable batteries in large-scale energy storage systems owing to the abundance and low-cost of sodium. Developing high-performance cathode and anode materials is a big challenge for SIBs. As we all know, TiNb2O7 (TNO) exhibits a high capacity of ~250 mAh g-1 with excellent capacity retention as a Li-insertion anode for lithium-ion batteries, but it has rarely been discussed as an anode for SIBs. Here, we demonstrate ball-milled TiNb2O7 (BM-TNO) as SIB anode, which provides an average voltage of ~0...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218506/enhanced-electrochemical-performance-of-layered-lithium-rich-cathode-materials-by-constructing-spinel-structure-skin-and-ferric-oxide-islands
#15
Shi Chen, Yu Zheng, Yun Lu, Yuefeng Su, Liying Bao, Ning Li, Yitong Li, Jing Wang, Renjie Chen, Feng Wu
Layered lithium-rich cathode materials have been considered as competitive candidates for advanced lithium-ion batteries, due to their merits in high capacity (more than 250 mAh·g-1), low cost and environmental benignity. However, they still surfer from poor rate capability and modest cycling performance. To address these issues, we have proposed and constructed a spinel-structure skin and ferric oxide islands on the surface of layered lithium-rich cathode materials through a facile wet chemical method. During the surface modification, Li ions in the surface area of pristine particles could be partially extracted by H+, along with the depositing process of ferric hydrogen...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218454/phase-separation-derived-core-shell-structured-cu11-v6-o26-v2-o5-microspheres-first-synthesis-and-excellent-lithium-ion-anode-performance-with-outstanding-capacity-self-restoration
#16
Jian Pei, Gang Chen, Qiang Zhang, Changfeng Bie, Jingxue Sun
Novel amorphous vanadium oxide coated copper vanadium oxide (Cu11 V6 O26 /V2 O5 ) microspheres with 3D hierarchical architecture have been successfully prepared via a microwave-assisted solution method and subsequent annealing induced phase separation process. Pure Cu11 V6 O26 microspheres without V2 O5 coating are also obtained by an H2 O2 solution dissolving treatment. When evaluated as an anode material for lithium-ion batteries (LIBs), the as-synthesized hybrid exhibits large reversible capacity, excellent rate capability, and outstanding capacity self-recovery...
February 20, 2017: Small
https://www.readbyqxmd.com/read/28218313/ultrasmall-fe2o3-nanoparticles-mos2-nanosheets-composite-as-high-performance-anode-material-for-lithium-ion-batteries
#17
Bin Qu, Yue Sun, Lianlian Liu, Chunyan Li, Changjian Yu, Xitian Zhang, Yujin Chen
Coupling ultrasmall Fe2O3 particles (~4.0 nm) with the MoS2 nanosheets is achieved by a facile method for high-performance anode material for Li-ion battery. MoS2 nanosheets in the composite can serve as scaffolds, efficiently buffering the large volume change of Fe2O3 during charge/discharge process, whereas the ultrasmall Fe2O3 nanoparticles mainly provide the specific capacity. Due to bigger surface area and larger pore volume as well as strong coupling between Fe2O3 particles and MoS2 nanosheets, the composite exhibits superior electrochemical properties to MoS2, Fe2O3 and the physical mixture Fe2O3+MoS2...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28218271/beads-milling-of-waste-si-sawdust-into-high-performance-nanoflakes-for-lithium-ion-batteries
#18
Takatoshi Kasukabe, Hirotomo Nishihara, Katsuya Kimura, Taketoshi Matsumoto, Hikaru Kobayashi, Makoto Okai, Takashi Kyotani
Nowadays, ca. 176,640 tons/year of silicon (Si) (>4N) is manufactured for Si wafers used for semiconductor industry. The production of the highly pure Si wafers inevitably includes very high-temperature steps at 1400-2000 °C, which is energy-consuming and environmentally unfriendly. Inefficiently, ca. 45-55% of such costly Si is lost simply as sawdust in the cutting process. In this work, we develop a cost-effective way to recycle Si sawdust as a high-performance anode material for lithium-ion batteries...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28217783/controlled-formation-of-uniform-nanoshells-of-manganese-oxide-and-their-potential-in-lithium-ion-batteries
#19
Xiao-Chan Liu, Jun-Yu Piao, De-Shan Bin, Tian-Qi Zhang, Shu-Yi Duan, Zi-Xiao Wu, An-Min Cao, Li-Jun Wan
Uniform nanoshells of manganese oxides have been successfully prepared by controlling their growth kinetics in solution. The prepared manganese oxides show promising electrochemical performance when used as an anode material in lithium ion batteries.
February 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28212405/a-simplified-fractional-order-impedance-model-and-parameter-identification-method-for-lithium-ion-batteries
#20
Qingxia Yang, Jun Xu, Binggang Cao, Xiuqing Li
Identification of internal parameters of lithium-ion batteries is a useful tool to evaluate battery performance, and requires an effective model and algorithm. Based on the least square genetic algorithm, a simplified fractional order impedance model for lithium-ion batteries and the corresponding parameter identification method were developed. The simplified model was derived from the analysis of the electrochemical impedance spectroscopy data and the transient response of lithium-ion batteries with different states of charge...
2017: PloS One
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