Lithium Bis(oxalate)borate Additive for Self-repairing Zincophilic Solid Electrolyte Interphases towards Ultrahigh-rate and Ultra-stable Zinc Anodes

Angew Chem Int Ed Engl. 2023 Sep 11:e202311032. doi: 10.1002/anie.202311032. Online ahead of print.ABSTRACTThe artificial solid electrolyte interphase (SEI) plays a pivotal role in Zn anode stabilization but its long-term effectiveness at high rates is still challenged. Herein, to achieve superior long-life and high-rate Zn anode, an exquisite electrolyte additive, lithium bis(oxalate)borate (LiBOB), is proposed to in-situ derive a highly Zn2+-conductive SEI and to dynamically patrol its cycling-initiated defects. Profiting from the as-constructed real-time, automatic SEI repairing mechanism, the Zn anode can be cycled with distinct reversibility over 1800 h at an ultrahigh current density of 50 mA cm-2, presenting a record-high cumulative capacity up to 45 Ah cm-2. The superiority of the formulated electrolyte is further demonstrated in the Zn||MnO2 and Zn||NaV3O8 full batteries, even when tested under harsh conditions (limited Zn supply (N/P≈3), 2500 cycles). This work brings inspiration for developing fast-charging Zn batteries toward grid-scale storage of renewable energy sources.PMID:37691598 | DOI:10.1002/anie.202311032

Source: Angewandte Chemie - September 11, 2023 Category: Chemistry Authors: Zhaoyu Zhang Yufei Zhang Minghui Ye Zhipeng Wen Yongchao Tang Xiaoqing Liu Cheng Chao Li Source Type: research