当前位置: X-MOL 学术Chem › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Cathodically Stable Li-O2 Battery Operations Using Water-in-Salt Electrolyte
Chem ( IF 23.5 ) Pub Date : 2018-04-12 , DOI: 10.1016/j.chempr.2018.02.015
Qi Dong , Xiahui Yao , Yanyan Zhao , Miao Qi , Xizi Zhang , Hongyu Sun , Yumin He , Dunwei Wang

Development of the Li-O2 battery into a practical technology hinges on the availability of a stable electrolyte. Because of the high reactivity of oxygen species in the system, no known organic electrolytes meet the stability requirements. The search for a suitable electrolyte system remains an outstanding challenge in Li-O2 battery research. Here, we show that the issue can be solved with the use of a water-in-salt electrolyte system that involves no organic solvents. In essence, the electrolyte consists of super-concentrated LiTFSI (lithium bis(trifluoromethanesulfonyl)imide), in which H2O molecules are locked to the ions and exhibit little reactivity toward Li2O2 or other oxygen species. The net result is a highly effective electrolyte that permits stable Li-O2 battery operations on the cathode with superior cycle lifetimes. A new door to practical Li-O2 batteries with high performance is opened up.



中文翻译:

使用盐包水电解质实现阴极稳定的Li-O 2电池操作

将Li-O 2电池开发为实用技术取决于稳定电解质的可用性。由于系统中氧物种的高反应性,因此没有已知的有机电解质满足稳定性要求。在Li-O 2电池研究中,寻找合适的电解质系统仍然是一项艰巨的挑战。在这里,我们表明可以通过使用不包含有机溶剂的盐包水电解质系统来解决该问题。本质上,电解质由超浓缩LiTFSI(双(三氟甲磺酰基)酰亚胺锂)组成,其中H 2 O分子被锁定在离子上,并且对Li 2 O 2的反应性很小或其他氧气。最终结果是一种高效电解液,可在阴极上稳定地运行Li-O 2电池,并具有出色的循环寿命。实用的高性能Li-O 2电池打开了新的大门。

更新日期:2018-04-12
down
wechat
bug