文献类型：期刊文献

英文题名：Reduced graphite oxide wrapped ZnO-SnO2 hollow nanospheres with as anodes for hybrid high energy density supercapacitors

作者：Li, Xiaoqin[1];Zhou, Lingling[1];Zhao, Shanhai[1];Ding, Hao[1];Cao, Haijing[1];Fang, Zebo[2];Jiang, Feng[1];Li, Huiyu[1];Liu, Yongsheng[1];Zhu, Yanyan[1]

机构：[1]Shanghai Univ Elect Power, Coll Math & Phys, Shanghai 200090, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2023

卷号：136

外文期刊名：DIAMOND AND RELATED MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001011576800001)、、EI(收录号：20230139432)、Scopus(收录号：2-s2.0-85160781774)、WOS

基金：Acknowledgements This work is supported by the National Natural Science Foundation of China (Nos. 51672172) , Program of Shanghai Academic/Technology Research Leader (No. 20XD1401800) , Science and Technology Com-mission of Shanghai Municipality (No. 19020501000) , Zhejiang Engi-neering Research Center of MEMS (No. MEMSZJERC2301) .

语种：英文

外文关键词：Bimetallic oxide; pseudo-capacitors; Supercapacitors

外文摘要：As cathode materials for supercapacitors, metallic oxide composites have high theoretical capacities, which have received widespread attentions. However, due to the rapid capacity degradation,it remains a challenge to the development of metallic oxides. A composite electrode material for supercapacitors scheme is proposed in this paper, which is constructed by novel hybrid ZnO-SnO2 nanoparticles, annealed from hollow nanospheres ZnSn (OH)(6), and is well encapsulated within a three-dimensional reduced graphene oxide (RGO). The RGO@ZnO-SnO2 electrodes show excellent performances with high initial coulomb efficiency of 98.9 %, high reversible capacities (581.8 F g(-1) at 0.5 A g(-1)), enhanced long-term cycling with capacity retention rate of 98 % and fantastic rate capability (440.9 F g(-1) at 5A g(-1)) after 1000 cycles. When assembled with AC cathodes, the full supercapacitors exhibit excellent electrochemical performances (26 Wh center dot kg(-1) at 0.75 kW center dot kg(-1), 8.2 W center dot kg(-1) at 9.87 kW center dot kg(-1)). This method also provides a new idea for the preparation of other bimetallic selenides, oxides, sulfides or phosphides with improved electrochemical properties.