水系锌离子电池(ZIBs)因安全性高、成本低、环境友好,以及负极锌高的理论容量(820 mAh·g^(−1))和低的氧化还原电位(−0.76 V vs.SHE)等优点而受到研究者们的广泛关注,有望应用于大规模储能领域,但循环寿命仍是限制其规模化应用的瓶...水系锌离子电池(ZIBs)因安全性高、成本低、环境友好,以及负极锌高的理论容量(820 mAh·g^(−1))和低的氧化还原电位(−0.76 V vs.SHE)等优点而受到研究者们的广泛关注,有望应用于大规模储能领域,但循环寿命仍是限制其规模化应用的瓶颈之一。通过电解液优化调控策略,可有效抑制正极材料的溶解、结构坍塌和界面副反应等问题,从而提高水系ZIBs的电化学性能。本文综述了电解液调控策略提升水系ZIBs正极材料电化学性能的研究进展,讨论了该策略所解决的具体问题和局限性,并对电解液体系的发展方向进行了展望。展开更多
Aqueous Zn/MnO2 rechargeable zinc-ion batteries(ZIBs)possess potential applications in electrochemical energy storage due to their safety,low cost,and environmental friendliness.However,manganese dioxide as the cathod...Aqueous Zn/MnO2 rechargeable zinc-ion batteries(ZIBs)possess potential applications in electrochemical energy storage due to their safety,low cost,and environmental friendliness.However,manganese dioxide as the cathode material has poor cycle stability and low conductivity.In this work,the SnO2@K-MnO2(SMO)composite was prepared using the hydrothermal method followed by the treatment with SnCl2 sensitization,and its electrochemical characteristics were examined using SMO as the cathode material for ZIBs.The reversible specific capacity reaches 298.2 mA-h-g-1 at 0.5A-g-1,and an excellent capacity retention of 86%is realized after 200 cycles,together with a high discharge capacity of 105 mA-h-g-1 at 10 A-g-1 and a long-term cycling life of over 8000 cycles with no apparent capacity fade.This cathode exhibits a long cycle life up to 2000 cycles at 2 Ag-1 with the mass loading of 5 mg-cm-2,and the battery maintains the capacity of 80%.The reversible co-embedding mechanism of H+/Zn2+in such a ZnlSMO battery was confirmed by XRD and SEM during the chargeldischarge process.This work can enlighten and promote the development of advanced cathode materialsforZIBs.展开更多
文摘水系锌离子电池(ZIBs)因安全性高、成本低、环境友好,以及负极锌高的理论容量(820 mAh·g^(−1))和低的氧化还原电位(−0.76 V vs.SHE)等优点而受到研究者们的广泛关注,有望应用于大规模储能领域,但循环寿命仍是限制其规模化应用的瓶颈之一。通过电解液优化调控策略,可有效抑制正极材料的溶解、结构坍塌和界面副反应等问题,从而提高水系ZIBs的电化学性能。本文综述了电解液调控策略提升水系ZIBs正极材料电化学性能的研究进展,讨论了该策略所解决的具体问题和局限性,并对电解液体系的发展方向进行了展望。
基金supported by the Science and Technology Planning Project of Gansu Province(22JR5RG569)the Faculty Research Grants Awarded by Principal's Funds(CXTD2022008).
文摘Aqueous Zn/MnO2 rechargeable zinc-ion batteries(ZIBs)possess potential applications in electrochemical energy storage due to their safety,low cost,and environmental friendliness.However,manganese dioxide as the cathode material has poor cycle stability and low conductivity.In this work,the SnO2@K-MnO2(SMO)composite was prepared using the hydrothermal method followed by the treatment with SnCl2 sensitization,and its electrochemical characteristics were examined using SMO as the cathode material for ZIBs.The reversible specific capacity reaches 298.2 mA-h-g-1 at 0.5A-g-1,and an excellent capacity retention of 86%is realized after 200 cycles,together with a high discharge capacity of 105 mA-h-g-1 at 10 A-g-1 and a long-term cycling life of over 8000 cycles with no apparent capacity fade.This cathode exhibits a long cycle life up to 2000 cycles at 2 Ag-1 with the mass loading of 5 mg-cm-2,and the battery maintains the capacity of 80%.The reversible co-embedding mechanism of H+/Zn2+in such a ZnlSMO battery was confirmed by XRD and SEM during the chargeldischarge process.This work can enlighten and promote the development of advanced cathode materialsforZIBs.
