期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201906661
关键词
catalysis; lithium-sulfur batteries; microreactors; Ni2Co4P3 nanowire arrays; polysulfide adsorption
类别
资金
- National Natural Science Foundation of China [21776121]
- Outstanding Youth Foundation of Jiangsu Province of China [BK20160012]
- National Key Research and Development Program of China [2017YFA0205700]
- National Materials Genome Project [2016YFB0700600]
- Jiangsu Shuanchuang Program
- Thousand Youth Talents Plan
High-loading lithium-sulfur (Li-S) batteries suffer from poor electrochemical properties. Electrocatalysts can accelerate polysulfides conversion and suppress their migration to improve battery cyclability. However, catalysts for Li-S batteries usually lack a rational design. A d-band tuning strategy is reported by alloying cobalt to metal sites of Ni2P to enhance the interaction between polysulfides and catalysts. A molecular or atomic level analysis reveals that Ni2Co4P3 is able to weaken the S-S bonds and lower the activation energy of polysulfides conversion, which is confirmed with temperature-dependent experiments. Ni2Co4P3 nanowires are further fabricated on a porous nickel scaffold to unfold the catalytic activity by its large surface area. Using a simple ion-selective filtration shell, a microreactor-like S cathode (MLSC) is constructed to realize ultrahigh S loading (25 mg cm(-2)). As such, a microreactor design integrates reaction and separation in one cell and can effectively address the polysulfide issues, the MLSC cell demonstrates excellent properties of cyclability and high capacity (1223 mAh g(-1) at 0.1 C). More importantly, the catalyst's designs and microreactor strategies provide new approaches for addressing the complicated issues of 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