标题: Efficient high-rate aqueous alkaline battery with dual-ion intercalation chemistry enabled by asymmetric electrode polarization

作者: Xu, XQ (Xu, Xiaoqi); Yang, HQ (Yang, Hangqi); Wang, XL (Wang, Xiaolong); Wang, DH (Wang, Dihua); Hu, XH (Hu, Xiaohong); Peng, C (Peng, Chuang)

来源出版物: CELL REPORTS PHYSICAL SCIENCE 卷: 3 期: 8 文献号: 100981 DOI: 10.1016/j.xcrp.2022.100981 出版年: AUG 17 2022

摘要: Aqueous batteries hold promise for grid energy storage for their intrinsic safety and cost effectiveness. Suppressing water electrolysis is a prime consideration, while the round-trip efficiency is an often-overlooked issue. Here, we report an aqueous alkaline dual-ion battery with Na+ and OH- intercalating anode and cathode. Despite the oxygen-evolving cathode, the battery exhibits high Coulombic efficiency because oxygen evolution is suppressed by asymmetric anode and cathode polarization, Together with the low voltage loss, the battery yields a high round-trip efficiency of 77.7% at 1 Ag-1 Other merits of this battery include moderate energy density and the use of safe, harmless, and cheap materials, manifesting a practical choice for grid energy storage. The ultra. fast intercalation reactions also endow the battery with high-rate performances comparable to supercapacitors. Moreover, this work proposes and verifies the concept of asymmetric electrode polarization, shifting the paradigm for electrode selection in aqueous batteries.

入藏号: WOS:000856516900003

语言: English

文献类型: Article

地址: [Xu, Xiaoqi; Yang, Hangqi; Wang, Dihua; Peng, Chuang] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Wang, Xiaolong] China Huaneng Clean Energy Res Inst, Beijing 102209, Peoples R China.

[Hu, Xiaohong] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.

通讯作者地址: Peng, C (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址: chuang.peng@whu.edu.cn

影响因子：7.832