TY - JOUR
T1 - All-Metal Phosphide Electrodes for High-Performance Quasi-Solid-State Fiber-Shaped Aqueous Rechargeable Ni-Fe Batteries
AU - Yang, Jiao
AU - Wang, Zhe
AU - Wang, Zhixun
AU - Zhang, Jing
AU - Zhang, Qichong
AU - Shum, Perry Ping
AU - Wei, Lei
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/2
Y1 - 2020/2
N2 - Aqueous secondary Ni-Fe batteries with superior energy density, cost-effectiveness, and outstanding safety contribute significantly toward the development of portable and wearable energy storage devices with high performance. However, the common electrode materials are nickel/iron or their oxides which have suffered from poor conductivity and cycle performance. As an ideal candidate to address these issues, metal phosphides may offer outstanding theoretical specific capacity, low conversion potential, and impressive redox. In this study, one novel type of high-performance flexible Ni-Fe battery with binder-free electrodes on conductive fiber substrates is successfully designed and fabricated. Carbon nanotube fibers with the direct grown hierarchical NiCoP nanosheet arrays and FeP nanowire arrays are fabricated first using hydrothermal synthesis and then the pursuant gas phosphating process. With the assistance of the PVA-KOH gel electrolyte, our fiber-shaped aqueous rechargeable battery (FARB) presents negligible capacity loss after bending 3000 times. Meanwhile, the assembled FARB has a significant capacity of 0.294 mA h/cm2 under the current density of 2 mA/cm2 and a high energy density of 235.6
AB - Aqueous secondary Ni-Fe batteries with superior energy density, cost-effectiveness, and outstanding safety contribute significantly toward the development of portable and wearable energy storage devices with high performance. However, the common electrode materials are nickel/iron or their oxides which have suffered from poor conductivity and cycle performance. As an ideal candidate to address these issues, metal phosphides may offer outstanding theoretical specific capacity, low conversion potential, and impressive redox. In this study, one novel type of high-performance flexible Ni-Fe battery with binder-free electrodes on conductive fiber substrates is successfully designed and fabricated. Carbon nanotube fibers with the direct grown hierarchical NiCoP nanosheet arrays and FeP nanowire arrays are fabricated first using hydrothermal synthesis and then the pursuant gas phosphating process. With the assistance of the PVA-KOH gel electrolyte, our fiber-shaped aqueous rechargeable battery (FARB) presents negligible capacity loss after bending 3000 times. Meanwhile, the assembled FARB has a significant capacity of 0.294 mA h/cm2 under the current density of 2 mA/cm2 and a high energy density of 235.6
KW - aqueous rechargeable batteries
KW - fiber-shaped devices
KW - metal phosphide
KW - Ni-Fe batteries
KW - wearable electronics
UR - https://www.scopus.com/pages/publications/85082097235
U2 - 10.1021/acsami.9b22128
DO - 10.1021/acsami.9b22128
M3 - Journal article
C2 - 32091200
AN - SCOPUS:85082097235
SN - 1944-8244
VL - 12
SP - 12801
EP - 12808
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 11
ER -