TiO2 Nanosheet-Redox Graphene Oxide/Sulphur Cathode for High-Performance Lithium-Sulphur Batteries

被引:2
作者
Hong, Shu [1 ]
Han, Yunzhao [2 ,3 ]
Zhang, Kun [2 ,3 ]
Wang, Mingbo [4 ]
Cui, Nana [4 ]
Du, Xiaoqinq [5 ]
Li, Qingyu [6 ]
Huang, Youguo [6 ]
Jiang, Feng [1 ]
Xie, Keyu [2 ,3 ]
机构
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Northwestern Polytech Univ, Sch Mat Sci & Engn, Ctr Nano Energy Mat, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[3] NPU, Shaanxi Joint Lab Graphene, Xian 710072, Peoples R China
[4] Dynabat New Energy Sci & Technol Co Ltd, Zhangzhou 363500, Fujian, Peoples R China
[5] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China
[6] Guangxi Normal Univ, Sch Chem & Pharmaceut Sci, Guangxi Key Lab Low Carbon Energy Mat, Guilin 541004, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium-Sulphur Batteries; Composite Cathode; TiO2; Nanosheets; Polysulphide; OXYGEN REDUCTION REACTION; CARBON NANOTUBE; POROUS CARBON; ANODE; SEPARATOR; ELECTROLYTE; CONFINEMENT; FABRICATION; COMPOSITE; HOST;
D O I
10.1166/jnn.2020.16957
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Lithium-sulphur batteries are considered as some of the most potent secondary-battery systems. These batteries are expected to have extensive applications in fields requiring high-energy density. However, such applications are hindered by some serious intrinsic obstacles. Herein, TiO2 nanosheets-rGO/sulphur (TiO2 NS-rGO/S) composites were fabricated through a two-process hydrothermal method. TiO2 nanosheets served as active sites for polysulphide absorption, whereas rGO offered space for sulphur improvement and TiO2 NS-rGO/S composites. The TiO2 NS-rGO/S composite exhibited high discharge capacity of 1099 mAh.g(-1) at 0.2 C rate and retained a capacity of 690 mAh.g(-1) after 100 cycles, with high sulphur loading of 3 mg.cm(-2). The high initial specific discharge capacity and improved cyclic stability were attributed to the synergistic effects of TiO2 nanosheets and rGO. These results indicated that the simple, low-cost and scalable method provides a novel perspective on practical utilisation of lithium-sulphur batteries.
引用
收藏
页码:1715 / 1722
页数:8
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