材料科学
阳极
复合数
电化学
锂(药物)
集电器
碳纳米管
电流密度
电极
化学工程
复合材料
电解质
内分泌学
物理化学
化学
工程类
物理
医学
量子力学
作者
Yaling Zhang,Shulong Chang,Ding Zhang,Sen Zhang,Lei Han,Ye Li,Rui Pang,Yuanyuan Shang,Cao A
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-04-26
卷期号:32 (28): 285404-285404
被引量:4
标识
DOI:10.1088/1361-6528/abf194
摘要
Abstract The transition metal sulfides/oxides have been considered as promising anode materials for lithium ion batteries due to their high theoretical capacities but have suffered limits from the unsatisfactory electronic conductivity and limited lifespan. Here, FeS micro-flowers are synthesized by hydrothermal treatment and are wared and grafted into layer-by-layer carbon nanotubes (CNT). Subsequently, FeS@Fe 2 O 3 /CNT composite films are obtained by annealing, during which the FeS micro-flowers are partially oxidized to core–shell FeS@Fe 2 O 3 micro-flowers. The FeS@Fe 2 O 3 /CNT composite electrodes exhibited high reversible capacity of 1722.4 mAh g −1 (at a current density of 0.2 A g −1 after 100 cycles) and excellent cycling stability (545.1 mAh g −1 at a current density of 2 A g −1 after 600 cycles) as self-supporting anodes. The prominent electrochemical performances are attributed to the unique reciprocal overlap architecture. This structure serves as a cushion to buffer large volume expansion during discharge/charge cycles, and ameliorates electrical conductivity. Due to their good specific capacity and cycle stability, these FeS@Fe 2 O 3 /CNT films have high potential application value to be used as high-performance anodes for lithium-ion, lithium sulfur and flexible packaging batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI