Decoupling Ion–Dipole Interactions via Competitive Coordination for Durable Dendrite‑Free Zinc Metal Batteries (IMAGE)
Caption
- A competitive permanent dipole L-Carnosine (L-CN) is introduced to interact with Zn2+ in the Zn2+–H2O solvation shell and form Zn2+(L-CN)y(H2O)x structure, enhancing the desolvation kinetics of [Zn(H2O)6]2+ and diffusion kinetics of zinc ions/atoms.
- The L-CN molecule forms a crowded Zn2+-conductive structure and remodels the inner Helmholtz plane layer with abundant Zn2+ flux, enabling durable dendrite-free Zn deposition.
- The cells with optimal electrolyte stabilize for 7000 h, a high Coulombic efficiency of 99.72%, and even stabilize over 200 h under a high depth of discharge of 85.4%. The assembled Zn//V2O5−x full cell delivers the capacity of 289 mAh g−1 after 500 cycles at 1 A g−1 under an N/P ratio of 3.98.
Credit
Bixian Chen, Xiaomin Cheng, Xiang Li, Qinghua Guan, Hao Li, Yongzheng Zhang, Shuang Cheng, Huihua Li, Yunjian Liu*, Jing Zhang, Hongzhen Lin*, Jian Wang*.
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License
CC BY-NC-ND