期刊
JOURNAL OF POWER SOURCES
卷 356, 期 -, 页码 18-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.04.064
关键词
Phosphorus; Carbon nanotubes; Coating film; Anode; Lithium ion batteries
资金
- National Natural Science Foundation of China [11575126]
- Natural Science Foundation of Tianjin [16JCZDJC37800]
- Science and Technology Plans of Tianjin [16ZXCLGX00090, 15PTSYJC00230]
Elemental phosphorus (P) is extensively explored as promising anode candidates due to its abundance, low-cost and high theoretical specific capacity. However, it is of great challenge for P-based materials as practical high-energy-density and long-cycling anodes for its large volume expansion and low conductibility. Here, we significantly improve both cycling and rate performance of red P by cladding the nanoconfined P film on interconnected multi-walled carbon nanotube networks (P-MWCNTs composite) via facile wet ball-milling. The red P-MWCNTs anode presents a superior high reversible capacity of 1396.6 mAh g(-1) on the basis of P-MWCNTs composite weight at 50 mA g(-1) with capacity retention reaching at-90% over 50 cycles. Even at 1000 mA it still maintains remarkable specific reversible capacity of 934.0 mAh g(-1). This markedly enhanced performance is ascribed to synergistic advantages of this unique structure: Intimate contacts between nanosized red P and entangled MWCNTs not only shorten the transmission routes of ions through MWCNTs toward red P, but also motivate the access with electrolyte to open structures of P film. Besides, the confined nanosized P film moderate volume expansions effectively and the entangled MWCNTs networks acted as conductive channels activate high ionic/electronic conductivity of the whole electrodes. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据