Li Wei, Yao Zhujun, Zhou Cheng-Ao, Wang Xiuli, Xia Xinhui, Gu Changdong, Tu Jiangping
State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Small. 2019 Oct;15(43):e1902432. doi: 10.1002/smll.201902432. Epub 2019 Sep 6.
The further development of high-power sodium-ion batteries faces the severe challenge of achieving high-rate cathode materials. Here, an integrated flexible electrode is constructed by smart combination of a conductive carbon cloth fiber skeleton and N-doped carbon (NC) shell on Na V (PO ) (NVP) nanoparticles via a simple impregnation method. In addition to the great electronic conductivity and high flexibility of carbon cloth, the NC shell also promotes ion/electron transport in the electrode. The flexible NVP@NC electrode renders preeminent rate capacities (80.7 mAh g at 50 C for cathode; 48 mAh g at 30 C for anode) and superior cycle performance. A flexible symmetric NVP@NC//NVP@NC full cell is endowed with fairly excellent rate performance as well as good cycle stability. The results demonstrate a powerful polybasic strategy design for fabricating electrodes with optimal performance.
高功率钠离子电池的进一步发展面临着实现高倍率阴极材料这一严峻挑战。在此，通过一种简单的浸渍方法，将导电碳布纤维骨架与NaV(PO)（NVP）纳米颗粒上的N掺杂碳（NC）壳层巧妙结合，构建了一种集成柔性电极。除了碳布具有良好的电子导电性和高柔韧性外，NC壳层还促进了电极中的离子/电子传输。柔性NVP@NC电极具有卓越的倍率容量（阴极在50C时为80.7 mAh g；阳极在30C时为48 mAh g）和优异的循环性能。柔性对称NVP@NC//NVP@NC全电池具有相当出色的倍率性能以及良好的循环稳定性。结果表明了一种用于制造具有最佳性能电极的强大多元策略设计。
