Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5149309 | Journal of Power Sources | 2017 | 9 Pages |
Abstract
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 gâ1 on the basis of P-MWCNTs composite weight at 50 mA gâ1 with capacity retention reaching at â¼90% over 50 cycles. Even at 1000 mA gâ1, it still maintains remarkable specific reversible capacity of 934.0 mAh gâ1. 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Zhiwei Xu, Yan Zeng, Liyuan Wang, Nan Li, Cheng Chen, Cuiyu Li, Jing Li, Hanming Lv, Liyun Kuang, Xu Tian,