标题
作者
作者:Xu, XJ (Xu, Xijun)[1,2 ]; Liu, J (Liu, Jun)[1,2 ]; Liu, ZB (Liu, Zhengbo)[1,2 ]; Shen, JD (Shen, Jiadong)[1,2 ]; Hu, RZ (Hu, Renzong)[1,2 ]; Liu, JW (Liu, Jiang-Wen)[1,2 ]; Ouyang, LZ (Ouyang, Liuzhang)[1,2 ]; Zhang, L (Zhang, Lei)[3 ]; Zhu, M (Zhu, Min)[1,2 ]
期刊信息
摘要
To solve the serious problems (the agglomeration of nano-Fe, dissolution of polysulfide, and low electronic conductivity of Li2S) of earth-abundant pyrite (FeS2) cathodes for lithium batteries, a simple in situ encapsulation and transformation route has been successfully developed to synthesis pitaya-structured porous carbon embedded with FeS2 nanoparticles. Due to such a hierarchical architecture design, this cathode of pitaya-structured FeS(2)p@C can effectively avoid the serious agglomeration and coarsening of small Fe nanoparticles, reduce the dissolution of polysulfide, and provide superior kinetics toward lithium storage, resulting in enhanced reversibility and rate capability. Cycling in the voltage region of 1.0-3.0 V at 0.3 A g(-1), the current conversion based FeS2@C cathode displays a high and stable energy density (about 1100 Wh kg(-1)), ultrahigh rate capability (a reversible capability of 660, 609, 554, 499, 449, and 400 mA h g(-1) at 0.2, 0.5, 1.0, 2.0, 5.0, and 10 A g(-1), respectively), and stable cycling performance.
关键词
作者关键词:FeS2 cathode; biomimetic structure; Li-ion batteries; rate capability; conversion reaction
作者信息
通讯作者地址:Liu, J; Zhu, M (通讯作者)
 | South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
| South China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China. |
地址:
电子邮件地址:msjliu@scut.edu.cn; memzhu@scut.edu.cn
出版商
类别分类
研究方向:Chemistry; Science & Technology - Other Topics; Materials Science
Web of Science 类别:Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary