Interconnected Ni₂P nanorods grown on nickel foam for binder free lithium ion batteries

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• 作者：Qin Li ; Jingjing Ma ; Huijun Wang ; Xia Yang ; ^{xiayang2@swu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Ruo Yuan ; Yaqin Chai ; ^{yqchai@swu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：nickel phosphide ; nickel foam ; binder free ; anode materials ; lithium ion batteries
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 September 2016
• 年：2016
• 卷：213
• 期：Complete
• 页码：201-206
• 全文大小：1551 K

文摘

Herein, we report a moderate and simple approach to synthesize nickel phosphide nanorods on nickel foam (Ni₂P/NF), which was employed as anode material for lithium ion batteries (LIBs). In this paper, interconnected Ni₂P nanorods were fabricated through hydrothermal treatment of NF and subsequently by high temperature phosphating. NF is not only regarded as nickel source and metal current collector, but also as a support to grow electro-active material (Ni₂P). Therefore, Ni₂P/NF could act as a self-supported working electrode for LIBs without any extra addition of cohesive binders. Moreover, benefiting from the conductive capacity of Ni₂P/NF, the active compound behaved superior lithium storage performance and cycling reversibility during electrochemical cycling process. The Ni₂P/NF delivered excellent reversibility of 507 mAh g⁻¹ at the current density of 50 mA g⁻¹ after 100 cycles. This work may provide a potential method for preparation of metal phosphides as promising materials for LIBs, hydrogen evolution reaction (HER) or other fields.