Rational construction of phosphate layer to optimize Cu-regulated Fe_(3)O_(4) as anode material with promoted energy storage performance for rechargeable Ni-Fe batteries

作     者：Shuhua Hao Yupeng Xing Peiyu Hou Gang Zhao Jinzhao Huang Shipeng Qiu Xijin Xu Shuhua Hao;Yupeng Xing;Peiyu Hou;Gang Zhao;Jinzhao Huang;Shipeng Qiu;Xijin Xu

作者机构：Laboratory of Functional Micro and Nano Materials and DevicesSchool of Physics and TechnologyUniversity of JinanJinan 250024China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第108卷第13期

页      面：133-141页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51802177) Independent Cultivation Program of Innovation Team of Ji’nan City(Grant No.2019GXRC011) 

主　　题：Ni-Fe batteries High voltage window regulation High energy and power density Anode materials Amorphous phosphate layer 

摘      要：Flexible aqueous energy storage devices with high security and flexibility are crucial for the progress of wearable energy ***,aqueous rechargeable Ni-Fe batteries owning a large theoretical capacity,low cost and outstanding safety characteristics have emerged as a promising candidate for flexible aqueous energy storage ***,Cu-doped Fe_(3)O_(4)(CFO)with 3D coral structure was prepared by doping Cu^(2+) based on Fe_(3)O_(4)nanosheets(FO).Furthermore,the Fe-based anode material(CFPO)grown on carbon fibers was obtained by reconstructing the surface of CFO to form a low-crystallization shell which can enhance the ion ***,the newly developed CFPO electrode as an innovative anode material further exhibited a high capacity of 117.5 mAh g^(-1)(or 423 F g^(-1))at 1 A g^(-1).Then,the assembled aqueous Ni-Fe batteries with a high cell-voltage output of 1.6 V deliver a high capacity of 49.02 mAh g^(-1) at 1 A g^(-1) and retention ratio of 96.8%for capacitance after 10000 continuous ***’s more,the aqueous quasi-solid-state batteries present a remarkable maximal energy density of 45.6 Wh kg^(-1) and a power density of 12 kW kg^(-1).This work provides an innovative and feasible way and optimization idea for the design of high-performance Fe-based anodes,and may promote the development of a new generation of flexible aqueous Ni-Fe batteries.