多硫化物
催化作用
吸附
电极
电催化剂
化学工程
阴极
材料科学
锂(药物)
氧化还原
硫黄
纳米技术
无机化学
化学
电化学
有机化学
电解质
物理化学
冶金
内分泌学
工程类
医学
作者
Hongqiang Wang,Na Zhang,Ying Li,Pengyao Zhang,Zhuo Chen,Chunfang Zhang,Qunji Xue,Yejing Dai,Qinghong Wang,Shuanghe Liu
标识
DOI:10.1021/acs.jpclett.9b02649
摘要
A unique flexible NiFe2O4 hollow sphere@S/rGO-CNT (NiFe2O4@S/C) cathode was rationally designed and synthesized to tackle the issues of lithium-sulfur batteries. In this strategy, the introduced rGO and CNTs offer a flexible and conductive skeleton to facilitate the transport of electrons and/or ions and a physical barrier to confine polysulfides. Furthermore, as an efficient sulfur host, NiFe2O4 hollow spheres can further absorb the soluble polysulfides by strong chemical interaction due to their intrinsic polarity and also serve as a catalyst to promote the redox kinetics of polysulfide conversion. Benefiting from the synergism of the physical confinement, polar chemical adsorption, and catalytic conversion, the as-prepared flexible NiFe2O4@S/C electrode delivers a high initial capacity of 1193 mAh g-1 at 100 mA g-1 and excellent long-term cycling stability up to 500 cycles with a low decay rate of 0.059% per cycle at 500 mA g-1.
科研通智能强力驱动
Strongly Powered by AbleSci AI