期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 1, 页码 705-714出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b01765
关键词
MXene; polar metal oxide; Li-S battery cathode; polysulfide adsorption; kinetics
资金
- National Natural Science Foundation of China [51731004, 51501038, 51772077, 51671054]
- Fundamental Research Funds for the Central Universities [2242018K40109]
- Program for Innovation Research Team (in Science and Technology) in the University of Henan Province [19IRTSTHN027]
Dissolution of lithium polysulfides (LiPSs), volume expansion, and the insulative nature of elemental sulfur are the major challenges for high-performance lithium sulfur batteries (LSBs). To mitigate these adverse effects, we developed a 3D MnO2 nanosheets@delaminated-Ti3C2 (MNSs@d-Ti3C2) aerogel framework via an electrostatic self-assembly approach, which proves to be a good sulfur host for high-performance LSBs. In the MNSpd-Ti3C2 aerogel, the high specific surface area and mesoporous structure benefit the high sulfur loading; the synergistic effect of the d-Ti3C2 and the polar MnO, provides a robust conductive pathway and promotes the LiPSs' adsorption and thus can effectively facilitate electron transport and strengthen the capture ability to confine the LiPSs in the cathode. As a result, the cathode based on MNSs@d-Ti3C2/S composite exhibits a high active-sulfur utilization (initial discharge capacity of 1140 mA h gs(-1)), good rate capacity (reversible capacity of 615 mA h gs(-1) at 2.0 C), outstanding specific discharge capacity, and superior capacity retention (only 0.06% capacity decay per cycle over 500 cycles at 1.0 C, even at sulfur loadings up to 3.7 mg cm(-2)).
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