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Heterostructure CoS/NC@MoS 2 Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries
Author(s) -
Zhao Yueying,
Bi Mengfan,
Qian Fangfang,
Zeng Peiyuan,
Chen Mengna,
Wang Ruojie,
Liu Yangyang,
Ding Yang,
Fang Zhen
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801166
Subject(s) - tafel equation , overpotential , materials science , anode , lithium (medication) , electrochemistry , carbon fibers , heterojunction , chemical engineering , hydrogen storage , ion , nanotechnology , electrode , composite material , chemistry , composite number , organic chemistry , optoelectronics , medicine , alloy , engineering , endocrinology
Uniquely structured CoS/N‐doped carbon@MoS 2 (denoted as CoS/NC@MoS 2 ) hollow spheres were successfully synthesized by using a well‐designed N‐rich Co‐metal organic framework (ZIF‐67) precursor and template. Owing to the good mechanical stability and conductivity of carbon hollow spheres, N‐doped carbon, and Co−Mo bonds, the as‐prepared CoS/NC@MoS 2 composites exhibit outstanding electrochemical performance both in electrocatalytic and energy storage applications. An overpotential of 77 mV at 10 mA cm −2 , and a Tafel slope of 67 mV dec −1 could be obtained in acid environment for the hydrogen evolution reaction. As an anode material for lithium‐ion batteries, the as‐prepared composites exhibit good cycling stability with a high reversible specific capacity of 802.4 mA h g −1 at a current density of 1 A g −1 after 400 cycles and good rate capability.