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https://www.readbyqxmd.com/read/28334524/suppression-of-lithium-dendrite-formation-by-using-lagp-peo-litfsi-composite-solid-electrolyte-and-lithium-metal-anode-modified-by-peo-litfsi-in-all-solid-state-lithium-batteries
#1
Chunhua Wang, Yifu Yang, Xingjiang Liu, Hai Zhong, Han Xu, Zhibin Xu, Huixia Shao, Fei Ding
The formation of lithium dendrites is suppressed using a Li1.5Al0.5Ge1.5(PO4)3-poly(ethylene oxide) (LAGP-PEO) composite solid electrolyte and a PEO (lithium bis(trifluoromethane)sulfonimide) [PEO (LiTFSI)] modified lithium metal anode in all-solid-state lithium batteries. The effects on the anode performance of the PEO content in the composite solid electrolyte and the molecular weight of PEO used to modify the Li anode are studied. The structure, surface morphology, and stability of the composite solid electrolyte are examined by X-ray diffraction spectroscopy, scanning electron microscopy and electrochemical tests...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28334522/microwave-assisted-morphology-evolution-of-fe-based-metal-organic-frameworks-and-their-derived-fe2o3-nanostructures-for-li-ion-storage
#2
Wenxiang Guo, Weiwei Sun, Li-Ping Lv, Shaofeng Kong, Yong Wang
Metal-organic-framework (MOF) approach is demonstrated as an effective strategy for the morphology evolution control of MIL-53(Fe) with assistance of microwave irradiation. Owing to the homogenous nucleation offered by microwave irradiation and confined porosity and skeleton by MOF templates, various porous Fe2O3 nanostructures including spindle, concave octahedron, solid octahedron, yolk-shell octahedron, and nanorod with porosity control are derived by simply adjusting irradiation time. The formation mechanism for the MOF precursors and their derived iron oxides with morphology control are investigated...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28333439/a-top-down-strategy-to-synthesize-mesoporous-dual-carbon-armored-mno-nanoparticles-for-lithium-ion-battery-anodes
#3
Wei Zhang, Jiannian Li, Jie Zhang, Jinzhi Sheng, Ting He, Meiyue Tian, Yufeng Zhao, Changjun Xie, Liqiang Mai, Shichun Mu
To overcome inferior rate capability and cycle stability of MnO-based materials as a lithium-ion battery anode associated with the pulverization and gradual aggregation during conversion process, we construct robust mesoporous N-doped carbon (N-C) protected MnO nanoparticles on reduced graphene oxide (rGO) (MnO@N-C/rGO) by a simple top-down incorporation strategy. Such dual carbon protection endows MnO@N-C/rGO with excellent structural stability and enhanced charge transfer kinetics. At 100 mA g-1, it exhibits superior rate capability as high as 864...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28332828/garnet-type-fast-li-ion-conductors-with-high-ionic-conductivities-for-all-solid-state-batteries
#4
Jian-Fang Wu, Wei Kong Pang, Vanessa K Peterson, Lu Wei, Xin Guo
All-solid-state Li-ion batteries with metallic Li anodes and solid electrolytes could offer superior energy density and safety over conventional Li-ion batteries. However, compared with organic liquid electrolytes, the low conductivity of solid electrolytes and large electrolyte/electrode interfacial resistance impede their practical application. Garnet-type Li-ion conducting oxides are amongst the most promising electrolytes for all-solid-state Li-ion batteries. In this work, the large radius Rb is doped at the La site of cubic Li6...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28326766/various-structured-molybdenum-based-nanomaterials-as-advanced-anode-materials-for-lithium-ion-batteries
#5
Zexing Wu, Wen Lei, Jie Wang, Rong Liu, Kedong Xia, Cuijuan Xuan, Deli Wang
A facile and scalable solvothermal high-temperature treatment strategy was developed to construct few-layered ultra-small MoS2 with less than three layers. These are embedded in carbon spheres (MoS2-C) and can be used as advanced anode material for lithium ion batteries (LIBs). In the resulting architecture, the intimate contact between MoS2 surface and carbon spheres can effectively avert aggregation and volume expansion of MoS2 during the lithiation-delithiation process. Moreover, it improves the structural integrity of the electrode remarkably, while the conductive carbon spheres provide quick transport of both electrons and ions within the electrode...
March 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28326762/facile-synthesis-of-hierarchical-porous-three-dimensional-free-standing-mnco2o4-cathodes-for-long-life-li-o2-batteries
#6
Haitao Wu, Wang Sun, Yan Wang, Fang Wang, Junfei Liu, Xinyang Yue, Zhenhua Wang, Jinshuo Qiao, David W Rooney, Kening Sun
Hierarchical porous three-dimensional MnCo2O4 nanowire bundles were obtained by a universal and low-cost hydrothermal method, which subsequently as a carbon-free and binder-free cathode for Li-O2 cell applications. This system showed a large discharge capacity up to 12919 mAh g-1 at 0.1 mA cm-2 as well as an outstanding rate capability. Under a constrained specific capacity of 500 and 1000 mAh g-1, the Li-O2 batteries could be successfully operated for over 300 and 144 cycles, respectively. Moreover, the charge voltage was markedly decreased to about 3...
March 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28323408/monodispersed-carbon-coated-cubic-nip2-nanoparticles-anchored-on-carbon-nanotubes-as-ultra-long-life-anodes-for-reversible-lithium-storage
#7
Peili Lou, Zhonghui Cui, Zhiqing Jia, Jiyang Sun, Yingbin Tan, Xiangxin Guo
In search of new electrode materials for lithium-ion batteries (LIB), metal phosphides that exhibit desirable properties such as high theoretical capacity, moderate discharge plateau and relative low polarization recently attract a great deal of attention as anode materials. However, the large volume changes and thus resulted collapse of electrode structure during long-term cycling are still the challenges for metal phosphide-based anodes. Here we report an electrode design strategy to solve these problems...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28322551/microporous-carbon-polyhedrons-encapsulated-polyacrylonitrile-nanofibers-as-sulfur-immobilizer-for-lithium-sulfur-battery
#8
Ye-Zheng Zhang, Zhen-Zhen Wu, Gui-Ling Pan, Sheng Liu, Xue-Ping Gao
Microporous carbon polyhedrons (MCPs) are encapsulated into polyacrylonitrile (PAN) nanofibers by electrospinning the mixture of MCPs and PAN. Subsequently, the as-prepared MCPs-PAN nanofibers are employed as sulfur immobilizer for lithium-sulfur battery. Here, the S/MCPs-PAN multi-composites integrate the advantage of sulfur/microporous carbon and sulfurized PAN. Specifically, with large pore volume, MCPs inside PAN nanofibers provide a sufficient sulfur loading. While PAN-based nanofibers offer a conductive path and matrix...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28322545/surface-modification-of-the-lifepo4-cathode-for-the-aqueous-rechargeable-lithium-ion-battery
#9
Artur Tron, Yong Nam Jo, Si Hyoung Oh, Yeong Don Park, Junyoung Mun
The LiFePO4 surface is coated with AlF3 via a simple chemical precipitation for aqueous rechargeable lithium ion batteries (ARLBs). During electrochemical cycling, the unfavorable side reactions between LiFePO4 and the aqueous electrolyte (1 M Li2SO4 in water) leave a highly resistant passivation film, which causes a deterioration in the electrochemical performance. The coated LiFePO4 by 1 wt.% AlF3 has a high discharge capacity of 132 mAh g-1 and a highly-improved cycle life, which shows 93% capacity retention even after 100 cycles, whereas the pristine LiFePO4 has a specific capacity of 123 mAh g-1 and a poor capacity retention of 82%...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28322285/silicon-and-carbon-nanocomposite-spheres-with-enhanced-electrochemical-performance-for-full-cell-lithium-ion-batteries
#10
Wei Wang, Zachary Favors, Changling Li, Chueh Liu, Rachel Ye, Chengyin Fu, Krassimir Bozhilov, Juchen Guo, Mihrimah Ozkan, Cengiz S Ozkan
Herein, facile synthesis of monodisperse silicon and carbon nanocomposite spheres (MSNSs) is achieved via a simple and scalable surface-protected magnesiothermic reduction with subsequent chemical vapor deposition (CVD) process. Li-ion batteries (LIBs) were fabricated to test the utility of MSNSs as an anode material. LIB anodes based on MSNSs demonstrate a high reversible capacity of 3207 mAh g(-1), superior rate performance, and excellent cycling stability. Furthermore, the performance of full cell LIBs was evaluated by using MSNS anode and a LiCoO2 cathode with practical electrode loadings...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28318144/eco-efficient-synthesis-of-highly-porous-coco3-anodes-for-li-and-na-storage-using-supercritical-co2-precursors
#11
Hui-Ying Li, Chuan-Ming Tseng, Cheng-Hsien Yang, Tai-Chou Lee, Ching-Yuan Su, Chien-Te Hsieh, Jeng-Kuei Chang
An eco-efficient synthesis route of high-performance carbonate anodes for Li+ and Na+ batteries is developed. With supercritical CO2 (SCCO2) as the precursor, which has gas-like diffusivity, extremely low viscosity, and near-zero surface tension, CoCO3 particles are uniformly formed and tightly connected on graphene nanosheets (GNSs). This synthesis can be conducted at 50 °C, which is considerably lower than the temperature required for conventional preparation methods, minimizing energy consumption. The obtained CoCO3 particles (~20 nm in diameter), which have a unique interpenetrating porous structure, can increase the number of electroactive sites, promote electrolyte accessibility, shorten ion diffusion length, and readily accommodate the strain generated upon charging/discharging...
March 20, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28318064/mos2-celgard-separator-as-efficient-polysulfide-barrier-for-long-life-lithium-sulfur-batteries
#12
Zahid Ali Ghazi, Xiao He, Abdul Muqsit Khattak, Niaz Ali Khan, Bin Liang, Azhar Iqbal, Jinxin Wang, Haksong Sin, Lianshan Li, Zhiyong Tang
A high lithium conductive MoS2 /Celgard composite separator is reported as efficient polysulfides barrier in Li-S batteries. Significantly, thanks to the high density of lithium ions on MoS2 surface, this composite separator shows high lithium conductivity, fast lithium diffusion, and facile lithium transference. When used in Li-S batteries, the separator is proven to be highly efficient for depressing polysulfides shuttle, leading to high and long cycle stability. With 65% of sulfur loading, the device with MoS2 /Celgard separator delivers an initial capacity of 808 mAh g(-1) and a substantial capacity of 401 mAh g(-1) after 600 cycles, corresponding to only 0...
March 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28317970/rheological-and-dynamic-insights-into-an-in-situ-reactive-interphase-with-graft-copolymers-in-multilayered-polymer-systems
#13
Bo Lu, Khalid Lamnawar, Abderrahim Maazouz
We provide rheological and dynamic insights into the role of an in situ reactive interphase with graft copolymers in multilayered polymer systems, using a polyamide-6 (PA6)/maleic anhydride grafted poly(vinylidene fluoride) (PVDF-g-MAH) bilayer as a model. Firstly, the influence of the reactive interphase on macroscopic melt flow behavior was studied. The in situ generated interphase from coupling reactions in bilayers significantly contributed to overall viscoelastic responses in both linear and nonlinear regimes...
March 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28317913/re-construction-layer-effect-of-lini0-8co0-15mn0-05o2-with-solvent-evaporation-process
#14
Kwangjin Park, Jun-Ho Park, Suk-Gi Hong, Byungjin Choi, Sung Heo, Seung-Woo Seo, Kyoungmin Min, Jin-Hwan Park
The solvent evaporation method on the structural changes and surface chemistry of the cathode and the effect of electrochemical performance of Li1.0Ni0.8Co0.15Mn0.05O2 (NCM) has been investigated. After dissolving of Li residuals using minimum content of solvent in order to minimize the damage of pristine material and the evaporation time, the solvent was evaporated without filtering and remaining powder was re-heated at 700 °C in oxygen environment. Two kinds of solvent, de-ionized water and diluted nitric acid, were used as a solvent...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28303712/lithium-metal-anodes-with-an-adaptive-solid-liquid-interfacial-protective-layer
#15
Kai Liu, Allen Pei, Hye Ryoung Lee, Biao Kong, Nian Liu, Dingchang Lin, Yayuan Liu, Chong Liu, Po-Chun Hsu, Zhenan Bao, Yi Cui
Lithium metal is an attractive anode for the next generation of high energy density lithium-ion batteries due to its high specific capacity (3,860 mAh/g) and the lowest anode potential of all. However, the key issue is that the static solid electrolyte interphase cannot match the dynamic volume changes of the Li anode, resulting in side reactions, dendrite growth, and poor electrodeposition behavior which prevent its practical applications. Here, we show that the "solid-liquid" hybrid behavior of a dynamically-crosslinked polymer enables its use as an excellent adaptive interfacial layer for Li metal anodes...
March 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28303437/molecular-dynamics-simulations-of-the-first-charge-of-a-li-ion-si-anode-nanobattery
#16
Diego E Galvez-Aranda, Victor Ponce, Jorge M Seminario
Rechargeable lithium-ion batteries are the most popular devices for energy storage but still a lot of research needs to be done to improve their cycling and storage capacity. Silicon has been proposed as an anode material because of its large theoretical capacity of ∼3600 mAh/g. Therefore, focus is needed on the lithiation process of silicon anodes where it is known that the anode increases its volume more than 300%, producing cracking and other damages. We performed molecular dynamics atomistic simulations to study the swelling, alloying, and amorphization of a silicon nanocrystal anode in a full nanobattery model during the first charging cycle...
April 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28301151/healing-high-loading-sulfur-electrodes-with-unprecedented-long-cycling-life-the-spatial-heterogeneity-control
#17
Hong-Jie Peng, Jia-Qi Huang, Xinyan Liu, Xin-Bing Cheng, Wen-Tao Xu, Chen-Zi Zhao, Fei Wei, Qiang Zhang
Self-healing capability helps biological systems to maintain their survivability and extend their lifespan. Similarly, self-healing is also beneficial to next-generation secondary batteries because high-capacity electrode materials, especially the cathodes such as oxygen or sulfur, suffer from shortened cyclic lives resulting from irreversible and unstable phase transfer. Herein, by mimicking a biological self-healing process, fibrinolysis, we introduced an extrinsic healing agent, polysulfide, to enable the stable operation of sulfur microparticle (SMiP) cathodes...
March 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28295667/a-novel-potassium-ion-based-dual-ion-battery
#18
Bifa Ji, Fan Zhang, Xiaohe Song, Yongbing Tang
In this work, combining both advantages of potassium-ion batteries and dual-ion batteries, a novel potassium-ion-based dual-ion battery (named as K-DIB) system is developed based on a potassium-ion electrolyte, using metal foil (Sn, Pb, K, or Na) as anode and expanded graphite as cathode. When using Sn foil as the anode, the K-DIB presents a high reversible capacity of 66 mAh g(-1) at a current density of 50 mA g(-1) over the voltage window of 3.0-5.0 V, and exhibits excellent long-term cycling performance with 93% capacity retention for 300 cycles...
March 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28295665/dual-functionalized-double-carbon-shells-coated-silicon-nanoparticles-for-high-performance-lithium-ion-batteries
#19
Shuangqiang Chen, Laifa Shen, Peter A van Aken, Joachim Maier, Yan Yu
To address the challenge of huge volume change and unstable solid electrolyte interface (SEI) of silicon in cycles, causing severe pulverization, this paper proposes a "double-shell" concept. This concept is designed to perform dual functions on encapsulating volume change of silicon and stabilizing SEI layer in cycles using double carbon shells. Double carbon shells coated Si nanoparticles (DCS-Si) are prepared. Inner carbon shell provides finite inner voids to allow large volume changes of Si nanoparticles inside of inner carbon shell, while static outer shell facilitates the formation of stable SEI...
March 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28294179/mixed-molybdenum-oxides-with-superior-performances-as-an-advanced-anode-material-for-lithium-ion-batteries
#20
Di Wu, Rui Shen, Rong Yang, Wenxu Ji, Meng Jiang, Weiping Ding, Luming Peng
A simple and effective carbon-free strategy is carried out to prepare mixed molybdenum oxides as an advanced anode material for lithium-ion batteries. The new material shows a high specific capacity up to 930.6 mAh·g(-1), long cycle-life (>200 cycles) and high rate capability. 1D and 2D solid-state NMR, as well as XRD data on lithiated sample (after discharge) show that the material is associated with both insertion/extraction and conversion reaction mechanisms for lithium storage. The well mixed molybdenum oxides at the microscale and the involvement of both mechanisms are considered as the key to the better electrochemical properties...
March 15, 2017: Scientific Reports
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