scholarly journals Self-assembled asymmetric membrane containing micron-size germanium for high capacity lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 92878-92884 ◽  
Author(s):  
Ian Byrd ◽  
Hao Chen ◽  
Theron Webber ◽  
Jianlin Li ◽  
Ji Wu

Asymmetric porous structure formedviaa self-assembly phase inversion method can significantly improve the cycling performance of lithium ion anodes made of micron-size germanium powders.

2021 ◽  
pp. 2151017
Author(s):  
Junyuan Gan ◽  
Yun Huang ◽  
Zhicheng Guo ◽  
Saisai Li ◽  
Wenhao Ren ◽  
...  

A novel type of gel polymer electrolyte (GPE) based on poly(methyl methacrylate) (PMMA) composite natural polymer hydroxyl propyl methyl cellulose (HPMC) was prepared with high comprehensive performances for lithium ion batteries. In this study, the composite membrane was prepared through phase inversion method. When the mass ratio of PMMA to HPMC is 4:6, the composite membrane exhibits a very high liquid uptake of 1715.07 wt.%, and the corresponding ion conductivity is as high as 6.89 × 10[Formula: see text] S cm[Formula: see text], lithium ion transference number reaches up to 0.80, and electrochemical stability window is high enough up to 5.0 V at room temperature. In addition, through charge and discharge experimental test, Li/GPE/LiFePO4 batteries exhibit excellent initial discharge capacities 166 and 121 mAh g[Formula: see text] at 0.2C and 1C rates, respectively. Therefore, the composite membrane with low cost and high performance researched in this work is an effective and promising GPE material, which presents a potential for applying in lithium-ion batteries (LIBs).


2018 ◽  
Vol 5 (6) ◽  
pp. 172370 ◽  
Author(s):  
Xuyan Liu ◽  
Xinjie Zhu ◽  
Deng Pan

Lithium-ion batteries are widely used in various industries, such as portable electronic devices, mobile phones, new energy car batteries, etc., and show great potential for more demanding applications like electric vehicles. Among advanced anode materials applied to lithium-ion batteries, silicon–carbon anodes have been explored extensively due to their high capacity, good operation potential, environmental friendliness and high abundance. Silicon–carbon anodes have demonstrated great potential as an anode material for lithium-ion batteries because they have perfectly improved the problems that existed in silicon anodes, such as the particle pulverization, shedding and failures of electrochemical performance during lithiation and delithiation. However, there are still some problems, such as low first discharge efficiency, poor conductivity and poor cycling performance, which need to be improved. This paper mainly presents some methods for solving the existing problems of silicon–carbon anode materials through different perspectives.


2015 ◽  
Vol 3 (12) ◽  
pp. 6392-6401 ◽  
Author(s):  
Bangjun Guo ◽  
Ke Yu ◽  
Hao Fu ◽  
Qiqi Hua ◽  
Ruijuan Qi ◽  
...  

Firework-shaped TiO2 microspheres embedded with few-layer MoS2 are prepared by a novel strategy, and the composite electrode exhibits excellent cycling performance, high capacity and rate capability compared to pure MoS2 and TiO2 electrodes.


2014 ◽  
Vol 2 (32) ◽  
pp. 13069-13074 ◽  
Author(s):  
Xin Xu ◽  
Bitao Dong ◽  
Shujiang Ding ◽  
Chunhui Xiao ◽  
Demei Yu

NiCoO2 nanosheets@amorphous CNT composites show enhanced cycling performance and rate capability as anode materials for lithium-ion batteries.


2016 ◽  
Vol 182 ◽  
pp. 147-150 ◽  
Author(s):  
Wang Sun ◽  
Junfei Liu ◽  
Haitao Wu ◽  
Xinyang Yue ◽  
Zhenhua Wang ◽  
...  

2020 ◽  
Vol 31 (13) ◽  
pp. 135404
Author(s):  
Meiqing Guo ◽  
Jiajun Chen ◽  
Weijia Meng ◽  
Liyu Cheng ◽  
Zhongchao Bai ◽  
...  

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