阳极
层状结构
材料科学
化学工程
纳米颗粒
法拉第效率
电化学
阴极
煅烧
纳米技术
电极
化学
复合材料
有机化学
催化作用
工程类
物理化学
作者
Jun Li,Qingqing Yang,Yuxia Hu,Mao‐Cheng Liu,Chun Lu,Hui Zhang,Ling‐Bin Kong,Wenwu Liu,Wen‐Jun Niu,Kun Zhao,Yi‐Chung Wang,Faliang Cheng,Zhiming M. Wang,Yu‐Lun Chueh
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-10-11
卷期号:7 (22): 18375-18383
被引量:50
标识
DOI:10.1021/acssuschemeng.9b03994
摘要
Sodium-ion capacitors (SICs) have attracted growing attention since they can combine the advantages of sodium-ion batteries (SIBs) and electrochemical capacitors simultaneously. The key point of constructing SICs focuses on developing high electron conductive anode materials and overcoming huge volume variation during the sodiation/desodiation process to improve excellent cycling stability and rate performance. Here, lamellar Mo2C nanosheets assembled by Mo2C nanoparticles (NPs) were successfully synthesized via a facile hydrolysis method with a calcination process, demonstrating an outstanding rate capability with superior cycle stability at 0.5 A g–1 after 1200 cycles (0.097% decay per cycle from the second to the 1200th cycle) in the half cell. After coupling with a commercial activated carbon cathode, SICs demonstrates a high energy and power density of 76.1 Wh kg–1 at 112 W kg–1 and an excellent cycle life with 83% of the capacity retained after 4000 cycles. The research shows that the lamellar Mo2C nanosheets assembled by Mo2C nanoparticles as a competitive anode material for sodium-ion hybrid devices can accommodate the volume change during the sodiation/desodiation and shorten the Na+ diffusion path because of its interconnected lamellar structure.
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