This review presents a comprehensive overview of recent advances in supercapacitor electrode materials,with a particular emphasis on the synergistic interactions between electrode materials and electrolytes.Beyond the...This review presents a comprehensive overview of recent advances in supercapacitor electrode materials,with a particular emphasis on the synergistic interactions between electrode materials and electrolytes.Beyond the conventional categorization of materials such as carbon-based materials,conducting polymers,and metal oxides,we focus on emerging nanostructured systems including MXenes,transition metal dichalcogenides(TMDs),black phosphorus,and quantum dots.We highlight how engineering the electrode–electrolyte interface—through the use of ionic liquids,gelbased,and solid-state electrolytes—can enhance device performance by expanding voltage windows,improving cycling stability,and suppressing selfdischarge.展开更多
Aqueous zinc-ion batteries(ZIBs)have emerged as a high-safety,cost-effective,and environment-benign energy storage solution for grid-scale applications,however,the lack of high-performance cathode materials that suppo...Aqueous zinc-ion batteries(ZIBs)have emerged as a high-safety,cost-effective,and environment-benign energy storage solution for grid-scale applications,however,the lack of high-performance cathode materials that support rapid zinc ion migration and allow scalable synthesis has hindered their commercialization.In this work,we propose a low-cost and mass-producible polyoxovanadate KZnV_(5)O_(14)·2.5H_(2)O(KZVO)cathode,demonstrating a high specific capacity of 275 mA h g^(-1)and an energy density of 201 W h kg^(-1).Notably,the special crystal structure is rich in large decavanadate complexes connected by weak hydron bonds and coordinated potassium/zinc ions,giving rise to criss-crossed zinc ion transportation channels and thus a relatively low hopping energy barrier(0.58 eV),comparable to that of lithium ion in LiFePO_(4).The intrinsic ultrafast ion-diffusion kinetics enables the achievement of an ultrahigh power density(6.8 kW kg^(-1)at 127 W h kg^(-1))and the ultrafast charging capability(70%state of charge in one minute)at an extremely high rate of 40 C(10 A g^(-1)).Apart from the high abundance and full availability of both zinc and vanadium,the high capacity,decent cycling stability,and excellent rate capability render the study of KZVO a fresh perspective on advancing the development of cathode materials for ZIBs.展开更多
基金supported by the Technology Innovation Program of the Ministry of Trade,Industry and Energy(MOTIE)(project No.RS-2023-00266568)。
文摘This review presents a comprehensive overview of recent advances in supercapacitor electrode materials,with a particular emphasis on the synergistic interactions between electrode materials and electrolytes.Beyond the conventional categorization of materials such as carbon-based materials,conducting polymers,and metal oxides,we focus on emerging nanostructured systems including MXenes,transition metal dichalcogenides(TMDs),black phosphorus,and quantum dots.We highlight how engineering the electrode–electrolyte interface—through the use of ionic liquids,gelbased,and solid-state electrolytes—can enhance device performance by expanding voltage windows,improving cycling stability,and suppressing selfdischarge.
基金financially supported by the Science and Technology Projects of Fujian Province(Grant No.2021H0042)The National Natural Science Foundation of China(Grant No.21971239).
文摘Aqueous zinc-ion batteries(ZIBs)have emerged as a high-safety,cost-effective,and environment-benign energy storage solution for grid-scale applications,however,the lack of high-performance cathode materials that support rapid zinc ion migration and allow scalable synthesis has hindered their commercialization.In this work,we propose a low-cost and mass-producible polyoxovanadate KZnV_(5)O_(14)·2.5H_(2)O(KZVO)cathode,demonstrating a high specific capacity of 275 mA h g^(-1)and an energy density of 201 W h kg^(-1).Notably,the special crystal structure is rich in large decavanadate complexes connected by weak hydron bonds and coordinated potassium/zinc ions,giving rise to criss-crossed zinc ion transportation channels and thus a relatively low hopping energy barrier(0.58 eV),comparable to that of lithium ion in LiFePO_(4).The intrinsic ultrafast ion-diffusion kinetics enables the achievement of an ultrahigh power density(6.8 kW kg^(-1)at 127 W h kg^(-1))and the ultrafast charging capability(70%state of charge in one minute)at an extremely high rate of 40 C(10 A g^(-1)).Apart from the high abundance and full availability of both zinc and vanadium,the high capacity,decent cycling stability,and excellent rate capability render the study of KZVO a fresh perspective on advancing the development of cathode materials for ZIBs.
