TY - JOUR
T1 - In Situ Cyclized Polyacrylonitrile Coating
T2 - Key to Stabilizing Porous High-Entropy Oxide Anodes for High-Performance Lithium-Ion Batteries
AU - Hong, Chang
AU - Tao, Runming
AU - Tan, Susheng
AU - Pressley, Lucas A.
AU - Bridges, Craig A.
AU - Li, Hui Ying
AU - Liu, Xiaolang
AU - Li, Haifeng
AU - Li, Jianlin
AU - Yuan, Huiyu
AU - Sun, Xiao Guang
AU - Liang, Jiyuan
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024
Y1 - 2024
N2 - High-entropy oxides (HEOs) composed of multiple metal elements have attracted great attention as anode materials for lithium-ion batteries (LIBs) due to the synergistic effects of various metal species. However, the practical applications of HEOs are still plagued by poor conductivity, unstable solid electrolyte interphase (SEI) and poor cycling stability. Herein, nanosized (FeCoNiCrMn)3O4 HEO (NHEO) is prepared successfully by the NaCl-assisted mechanical ball-milling strategy. Novelly, polyacrylonitrile (PAN) is used as the binder and then in situ thermochemically cyclized to construct a cyclized PAN (cPAN) outer layer onto NHEO (NHEO-cPAN). The in situ formed cPAN coating not only improves the electrical conductivity, but also reinforces the structural and interfacial stability, and thereby, the resulted NHEO-cPAN electrode exhibits significantly enhanced rate and cyclic performance. Specifically, NHEO-PAN500 electrode delivers a high reversible capacity of 560 mAh g−1 at 5 A g−1 and a high-capacity retention of 83% over 800 cycles at 3 A g−1. Furthermore, the structural evolution and electrochemical behavior of NHEO-PAN electrode during discharge/charge is systematically investigated by operando X-ray diffraction, in situ impedance spectroscopy and ex situ high-resolution transmission electron microscopy. Therefore, this work provides new insights into the engineering of electrode and interphase for high-performance HEO electrode materials, potentially enlightening the practical applications of HEO-based LIBs.
AB - High-entropy oxides (HEOs) composed of multiple metal elements have attracted great attention as anode materials for lithium-ion batteries (LIBs) due to the synergistic effects of various metal species. However, the practical applications of HEOs are still plagued by poor conductivity, unstable solid electrolyte interphase (SEI) and poor cycling stability. Herein, nanosized (FeCoNiCrMn)3O4 HEO (NHEO) is prepared successfully by the NaCl-assisted mechanical ball-milling strategy. Novelly, polyacrylonitrile (PAN) is used as the binder and then in situ thermochemically cyclized to construct a cyclized PAN (cPAN) outer layer onto NHEO (NHEO-cPAN). The in situ formed cPAN coating not only improves the electrical conductivity, but also reinforces the structural and interfacial stability, and thereby, the resulted NHEO-cPAN electrode exhibits significantly enhanced rate and cyclic performance. Specifically, NHEO-PAN500 electrode delivers a high reversible capacity of 560 mAh g−1 at 5 A g−1 and a high-capacity retention of 83% over 800 cycles at 3 A g−1. Furthermore, the structural evolution and electrochemical behavior of NHEO-PAN electrode during discharge/charge is systematically investigated by operando X-ray diffraction, in situ impedance spectroscopy and ex situ high-resolution transmission electron microscopy. Therefore, this work provides new insights into the engineering of electrode and interphase for high-performance HEO electrode materials, potentially enlightening the practical applications of HEO-based LIBs.
KW - anode material
KW - cyclized polyacrylonitrile coating
KW - high-entropy oxide
KW - interphase engineering
KW - lithium-ion battery
UR - http://www.scopus.com/inward/record.url?scp=85201826166&partnerID=8YFLogxK
U2 - 10.1002/adfm.202412177
DO - 10.1002/adfm.202412177
M3 - Article
AN - SCOPUS:85201826166
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -