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A >200 Wh kg−1 anode-free Na pouch battery at −40°C enabled by manipulating electrolyte equilibrium

Qiaonan ZhuSchool of Chemistry, Beihang University , Beijing 100191 ,Jiawei WangSchool of Materials and Chemistry, University of Shanghai for Science and Technology , Shanghai 200093 ,Liqiang WuBeijing Xibei Power Technology Co., Ltd ., Beijing 102600 ,Hao LanSchool of Chemistry, Beihang University , Beijing 100191 ,Jiangchun ChenSchool of Chemistry, Beihang University , Beijing 100191 ,Liwei ChengSchool of Chemistry, Beihang University , Beijing 100191 ,Bin ZhouBeijing Xibei Power Technology Co., Ltd ., Beijing 102600 ,Daojun YangBeijing Xibei Power Technology Co., Ltd ., Beijing 102600 ,Jie YangHydrogen Energy Research Center, PetroChina Petrochemical Research Institute , Beijing 100083 ,Mirtemir KurbanovArifov Institute of Ion-Plasma and Laser Technologies, Academy of Sciences of the Republic of Uzbekistan , Tashkent 100077 ,Shuai DongSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan D&A Engineering Center of Advanced Battery Materials, Shangqiu Normal University , Shangqiu 476000 ,Hua WangSchool of Chemistry, Beihang University , Beijing 100191 ,
National Science Reviewjournal2025en
ABI

Аннотация

ABSTRACT Cryogenic energy-dense batteries are essential for cold-climate applications. Anode-free configuration raises great opportunities for maximizing the cell-level energy density of batteries. However, high energy density of low-temperature anode-free batteries is still plagued by the lack of competent electrolytes with combined high compatibility towards metal anode and stability at high voltages. Herein, we report a high-energy-density anode-free Na battery at low temperatures via electrolyte association-dissociation equilibrium regulation. The optimized equilibrium facilitates the desolvation process and the formation of inorganic-rich anode/cathode-electrolyte interphases, thus simultaneously promoting low-temperature kinetics and high-voltage stability of the battery. Consequently, a high Coulombic efficiency (99.90%) of Na plating/stripping and a wide electrochemical stability window of electrolyte (>4.3 V) at −40°C are achieved. The anode-free Al@C||NaNi1/3Fe1/3Mn1/3O2 pouch cell delivers a record-high energy density of 204 Wh kg−1entire cell at −40°C among the reported low-temperature rechargeable batteries. This work represents a defining step for energy-dense batteries which can operate at low temperatures.

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Мавзулар

Advancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAdvanced battery technologies research

Идентификаторлар

DOI
10.1093/nsr/nwaf124

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