Open AccessNitrogen‐doped nanoarray‐modified 3D hierarchical graphene as a cofunction host for high‐performance flexible Li‐S battery
Author(s) -
Lu Ruichao,
Cheng Meng,
Mao Lijuan,
Zhang Miao,
Yuan Hongxin,
Amin Kamran,
Yang Chen,
Cheng Yueli,
Meng Yuena,
Wei Zhixiang
Publication year - 2020
Publication title -
ecomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3173
DOI - 10.1002/eom2.12010
Subject(s) - anode , cathode , graphene , materials science , battery (electricity) , nanotechnology , energy storage , doping , lithium (medication) , chemical engineering , optoelectronics , electrode , chemistry , engineering , endocrinology , medicine , power (physics) , physics , quantum mechanics
Lithium‐sulfur (Li‐S) batteries with high energy density are promising candidates for next‐generation energy storage systems. Practical application of Li‐S batteries is hindered by shuttle effect of polysulfides and Li dendrites growth. Herein, a self‐supporting cofunction host is constructed with 3D hierarchical graphene modified by N‐doped nanoarrays, for both Li anode and S cathode to improve their performances simultaneously. Attributed to high conductivity, strong affinity, and optimized Li‐ion transport pathway of N‐doped nanoarrays, cofunction host provide excellent Li and S load, which facilitates uniform Li deposition and enhanced S conversion. Particularly, an extra graphene barrier is specialized for S cathode to inhibit the shuttle effect. As a result, Li anode shows long cycle life with outstanding Li‐plating behavior, and S cathode shows high capacity and ultrahigh capacity retention with good immobilization of polysulfides. More importantly, the integrated Li‐S battery shows long cycle stability and good flexibility, which is important for future application.