Zhou Chuang-An, Sun Xiuyu, Yan Wei, Zuo Yinze, Zhang Jiujun
Institute for Sustainable Energy/College of Sciences, Shanghai Unversity, Shanghai, 200444, P. R. China.
College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China.
Chem Asian J. 2022 Jul 15;17(14):e202200328. doi: 10.1002/asia.202200328. Epub 2022 May 23.
In the effort to accelerate adsorption and catalytic conversion of lithium polysulfides (Li-PSs) and suppress the shuttle effect of lithium-sulfur batteries (LSBs), the Ti O nanosheets/carbon material-modified separator is successfully fabricated to reducing soluble Li-PSs' crossover from cathode to anode. The catalyst of mesoporous Ti O nanosheets with O-Ti-O units synthesized at low temperature shows both excellent conductivity and high surface area. The modified separator can serve as a diffusion barrier of Li-PSs and catalyst for converting soluble low-chain sulfides into insoluble ones and then remarkably enhance the sulfur utilization and electrochemical performance of the LSB. This work provides a feasible avenue in both design and synthesis of mesoporous catalyst materials for suppressing the shuttle effect of lithium-sulfur batteries.
为了加速多硫化锂（Li-PSs）的吸附和催化转化并抑制锂硫电池（LSBs）的穿梭效应，成功制备了TiO纳米片/碳材料改性隔膜，以减少可溶性Li-PSs从阴极到阳极的交叉。在低温下合成的具有O-Ti-O单元的介孔TiO纳米片催化剂具有优异的导电性和高比表面积。改性隔膜可作为Li-PSs的扩散屏障和将可溶性低链硫化物转化为不溶性硫化物的催化剂，进而显著提高LSB的硫利用率和电化学性能。这项工作为设计和合成用于抑制锂硫电池穿梭效应的介孔催化剂材料提供了一条可行的途径。
