标题
作者
作者:Shen, JD (Shen, Jiadong)[1,2,3 ]; Liu, J (Liu, Jun)[1,2,3 ]; Liu, ZB (Liu, Zhengbo)[1,2,3 ]; Hu, RZ (Hu, Renzong)[1,2,3 ]; Liu, JW (Liu, Jiangwen)[1,2,3 ]; Zhu, M (Zhu, Min)[1,2,3 ]
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文献类型:Article
摘要
The sulfur cathode, as a new generation of lithium-ion battery cathode material, has a high theoretical energy density of about 2500Whkg(-1). However, the low conductivity of sulfur and the shuttle effect, widely presenting in the lithiation/de-lithiation process, seriously hinder its practical application. Here, we report a new nanoconfined oxidation route (first complete oxidation of metal sulfide and subsequently partial oxidation of the generated S from sulfide) for S cathode encapsulated with MnO2 nanosheets and N-doped carbon hollow spheres. This nanoconfined oxidation route can successfully confine the sulfur particles in the interior of the carbon shell, and the rationally introduced nonpolar carbon and polar MnO2 can both reduce the dissolution of polysulfide during the charge-discharge process. The obtained well-defined S-MnO2@C cathode exhibits high specific capacity with excellent cycling performance and superior rate capability.
关键词
作者关键词:cathode material; encapsulating structure; Li-S batteries; N-doped carbon; nanoconfined oxidation
作者信息
通讯作者地址:Liu, J (通讯作者)
 | South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
| South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China. |
| South China Univ Technol, SUNWODA SCUT Joint Lab Adv Energy Storage Technol, Guangzhou 510641, Guangdong, Peoples R China. |
地址:
电子邮件地址:msjliu@scut.edu.cn
出版商
类别分类
研究方向:Chemistry
Web of Science 类别:Chemistry, Multidisciplinary