Co-construction of advanced sulfur host by implanting titanium carbide into Aspergillus niger spore carbon  

作　　者：Rongfan Zhou Shenghui Shen Yu Zhong Ping Liu Yongqi Zhang Lingjie Zhang Xiuli Wang Xinhui Xia Jiangping Tu 

机构地区：[1]State Key Laboratory of Silicon Materials,Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province,and Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China [2]Yangtze Delta Region Institute(Huzhou)&Institute of Fundamental and Frontier Science,University of Electronic Science and Technology of China,Huzhou 313000,China

出　　处：《Chinese Chemical Letters》2022年第8期3981-3986,共6页中国化学快报（英文版）

基　　金：supported by Natural Science Funds for Distinguished Young Scholars of Zhejiang Province(No.LR20E020001);National Natural Science Foundation of China(Nos.52073252 and51772272);Foundation of State Key Laboratory of Coal Conversion(No.J20-21-909)。

摘　　要：It is of great importance to directionally construct advanced carbon host to achieve high-performance carbon/sulfur cathodes for lithium sulfur batteries(LSBs).Herein,we report a unique hollow pumpkinlike carbon with notable rich-wrinkle microstructure and intrinsically dual doping with N&P elements via a facile annealing process of Aspergillus niger spore.Furthermore,highly conductive polar absorbents,Ti C nanoparticles,are in situ implanted into the above Aspergillus niger spore carbon(ANSC)by carbothermal reaction,accordingly forming high-performance ANSC/TiC composite host for sulfur.Impressively,TiC nanoparticles play dual roles of not only pore formation in ANSC matrix but also enhancement of chemical absorption with polysulfides.With the positive synergistic effect between N&P co-doped ANSC matrix and Ti C polar absorbent,the designed ANSC/Ti C-S cathodes show unique advantages including larger accommodation space for sulfur,higher surface area,enhanced conductivity and better chemical absorption with soluble polysulfide intermediates.Consequently,the ANSC/Ti C-S cathodes are endowed with good rate performance(496 mAh/g at 0.5 C)and enhanced long-term cycling stability(736 mAh/g with a capacity retention of 78.8%at 0.1 C after 100 cycles).Our research opens a new door to controllably design advanced composite cathodes from microorganisms for application in lithium sulfur batteries.

关 键 词：Aspergillus niger Spore carbon Titanium carbide Cathode Lithium sulfur batteries 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]