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Graphene quantum dots-shielded Na3(VO)2(PO4)2F@C nanocuboids as robust cathode for Na-ion batteryстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 января 2017 г.
- Авторы: Gang Deng, Dongliang Chao, Yuwei Guo, Zhen Chen, Huanhuan Wang, Savilov Serguei V., Jianyi Lind, Shen Ze Xiang
- Журнал: Energy Storage Materials
- Том: 5
- Номер: 10
- Год издания: 2016
- Первая страница: 198
- Последняя страница: 204
- DOI: 10.1016/j.ensm.2016.07.007
- Аннотация: The natural abundance, environmental friendliness, low cost of sodium salts, and the electrochemical properties similarity between lithium- and sodium-ion batteries (LIBs, SIBs) make SIBs one of the most promising alternatives to current LIBs. In order to match with performances of LIBs, challenges in improving high-rate capability and long-term cycling stability of SIBs need to be addressed. In this work, we design and construct an excellent cathode material for SIB, i.e. carbon-coated, graphene quantum dots (GQDs) shielded Na3(VO)2(PO4)2F nanocuboids (NVOPF@C), which possesses highly exposed crystalline a–b planes for rapid ion diffusion. The GQD as well as amorphous carbon layer shielding NVOPF nanocuboids not only can improve the charge transport and transfer kinetics, but also stabilize the open framework structure from the agglomeration. Impressively, NVOPF@C delivers an unexpectedly high capacity of 70 mA h g−1 at ultra-high rate 45 C, with 81% retention after 2000 cycles.
- Добавил в систему: Савилов Сергей Вячеславович