Oxygen vacancies(Ov)within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage systems.However,construction of surface Ovoften leads to instability in electrode structure and irreversibl...Oxygen vacancies(Ov)within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage systems.However,construction of surface Ovoften leads to instability in electrode structure and irreversible electrochemical reactions,posing a significant challenge.To overcome these challenges,atomic heterostructures are employed to address the structural instability and enhance the mass/charge transfer dynamics associated with phase conversion mechanism in aqueous electrodes,Herein,we introduce an atomic S-Bi_(2)O_(3)heterostructure(sulfur(S)anchoring on the surface Ovof Bi_(2)O_(3)).The integration of S within Bi_(2)O_(3)lattice matrix triggers a charge imbala nce at the heterointerfaces,ultimately resulting in the creation of a built-in electric field(BEF).Thus,the BEF attracts OH-ions to be adsorbed onto Bi within the regions of high electron cloud overlap in S-Bi_(2)O_(3),facilitating highly efficient charge transfer.Furthermore,the anchored S plays a pivotal role in preserving structural integrity,thus effectively stabilizing the phase conversion reaction of Bi_(2)O_(3).As a result,the S-Bi_(2)O_(3)electrode achieves72.3 mA h g^(-1)at 10 A g^(-1)as well as high-capacity retention of 81.9%after 1600 cycles.Our innovative SBi_(2)O_(3)design presents a groundbreaking approach for fabricating electrodes that exhibit efficient and stable mass and charge transfer capabilities.Furthermore,it enhances our understanding of the underlying reaction mechanism within energy storage electrodes.展开更多
基金supported by the Research Program of Jilin Province Development and Reform Commission(2024C018-6).
文摘Oxygen vacancies(Ov)within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage systems.However,construction of surface Ovoften leads to instability in electrode structure and irreversible electrochemical reactions,posing a significant challenge.To overcome these challenges,atomic heterostructures are employed to address the structural instability and enhance the mass/charge transfer dynamics associated with phase conversion mechanism in aqueous electrodes,Herein,we introduce an atomic S-Bi_(2)O_(3)heterostructure(sulfur(S)anchoring on the surface Ovof Bi_(2)O_(3)).The integration of S within Bi_(2)O_(3)lattice matrix triggers a charge imbala nce at the heterointerfaces,ultimately resulting in the creation of a built-in electric field(BEF).Thus,the BEF attracts OH-ions to be adsorbed onto Bi within the regions of high electron cloud overlap in S-Bi_(2)O_(3),facilitating highly efficient charge transfer.Furthermore,the anchored S plays a pivotal role in preserving structural integrity,thus effectively stabilizing the phase conversion reaction of Bi_(2)O_(3).As a result,the S-Bi_(2)O_(3)electrode achieves72.3 mA h g^(-1)at 10 A g^(-1)as well as high-capacity retention of 81.9%after 1600 cycles.Our innovative SBi_(2)O_(3)design presents a groundbreaking approach for fabricating electrodes that exhibit efficient and stable mass and charge transfer capabilities.Furthermore,it enhances our understanding of the underlying reaction mechanism within energy storage electrodes.
