期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 19, 页码 21701-21708出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c03750
关键词
lithium-sulfur batteries; interlayer; lean electrolyte conditions; catalytic; polysulfide conversion; Co9S8 nanorods
资金
- Beijing Outstanding Young Scientists Program [BJJWZYJH01201910007023]
- National Key Research and Development Program of China New Energy Project for Electric Vehicle [2016YFB0100204]
- National Natural Science Foundation of China [51772030]
- National Postdoctoral Program for Innovative Talent [BX20180037]
As a result of the high theoretical energy density of lithium-sulfur (Li-S) batteries, they have been accepted as the next-generation energy storage system. Nevertheless, the current performance of Li-S batteries is still unsatisfactory under lean electrolyte conditions. It is because of sluggish deposition of Li2S2/Li2S passivating the sulfur/electrolyte interface, thus leading to lower sulfur use and bad rate performances of Li-S batteries. Herein, a novel Co9S8 nanorod-based catalytic interlayer placed between the cathode and separator is proposed. The interlayer possesses a three-dimensional open structure, which facilitates electrolyte infiltration but without trapping too much electrolyte. As a result, the electrocatalytic Co9S8 nanorods within the interlayer promote faster electrochemical kinetics and enhance the conversion of polysulfides, thus resulting in a higher specific discharge capacity and better rate and cycling performance. This work proves a feasible method in developing practical Li-S batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据