TY - JOUR
T1 - From surface loading to precise confinement of polyoxometalates for electrochemical energy storage
AU - Wang, Chongji
AU - Song, Yanhui
AU - Cong, Wenhua
AU - Yan, Yuanyuan
AU - Wang, Meiling
AU - Zhou, Jiadong
N1 - Publisher Copyright:
© 2023
PY - 2023/12
Y1 - 2023/12
N2 - Because of abundant redox activity, broad tunability, and specific atomic structure, polyoxometalates (POMs or POM) clusters have attracted burgeoning interests in electrochemical especially energy storage fields. Nevertheless, due to the high solubility and fully oxidized state, they often suffer from electrically insulation as well as chemical and electrochemical instability. Traditional noncovalent loading or covalent grafting of POMs on conductive substrates have been successfully performed to overcome this problem. However, severe shedding or agglomeration of POMs arising from weak interactions with substrates or excessive entrapment or weak destruction in conductive supports cause significantly reduced availability and stability. To this end, precise confinement of POMs into conductive supports has been tried to improve their dispersibility and stability. Herein, recent progress of POMs from surface loading to precise confinement in the electrochemistry energy storage field is reviewed. Firstly, we illustrate the typical non-confinement methods (viz. covalent and non-covalent) for supported POMs in energy storage applications. Secondly, different strategies for precise confinement of POMs in organic and inorganic materials for related applications are also discussed. Finally, future research directions and opportunities for confined POMs, and derived ultrafine nanostructures are also proposed. This review seeks to point out future research directions of supported POMs in the electrochemistry-related fields.
AB - Because of abundant redox activity, broad tunability, and specific atomic structure, polyoxometalates (POMs or POM) clusters have attracted burgeoning interests in electrochemical especially energy storage fields. Nevertheless, due to the high solubility and fully oxidized state, they often suffer from electrically insulation as well as chemical and electrochemical instability. Traditional noncovalent loading or covalent grafting of POMs on conductive substrates have been successfully performed to overcome this problem. However, severe shedding or agglomeration of POMs arising from weak interactions with substrates or excessive entrapment or weak destruction in conductive supports cause significantly reduced availability and stability. To this end, precise confinement of POMs into conductive supports has been tried to improve their dispersibility and stability. Herein, recent progress of POMs from surface loading to precise confinement in the electrochemistry energy storage field is reviewed. Firstly, we illustrate the typical non-confinement methods (viz. covalent and non-covalent) for supported POMs in energy storage applications. Secondly, different strategies for precise confinement of POMs in organic and inorganic materials for related applications are also discussed. Finally, future research directions and opportunities for confined POMs, and derived ultrafine nanostructures are also proposed. This review seeks to point out future research directions of supported POMs in the electrochemistry-related fields.
KW - Battery
KW - Confinement
KW - Electrochemical energy storage
KW - Non-confinement
KW - Polyoxometalates
KW - Supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85162114058&partnerID=8YFLogxK
U2 - 10.1016/j.cclet.2023.108194
DO - 10.1016/j.cclet.2023.108194
M3 - Review article
AN - SCOPUS:85162114058
SN - 1001-8417
VL - 34
JO - Chinese Chemical Letters
JF - Chinese Chemical Letters
IS - 12
M1 - 108194
ER -