Environmentally Benign and Long Cycling Mn-Ion Full Batteries Enabled by Hydrated Eutectic Electrolytes and Polycarbonyl Conjugated Organic Anodes

作者：Tengfei Dai, Binze Yang, Jie Wei, Xinmei Song, Pengbo Zhang, Yuzhu Liu, Sheng Wen, Huan Li, Tianchen Yu, Zuoxiu Tie, Huapeng Sun, Yichao Yan, Zhong Jin · 发表于：Journal of the American Chemical Society · 年份：2025 · DOI：10.1021/jacs.5c01639 · 被引用次数：30 · 研究领域：Advanced battery technologies research、Advancements in Battery Materials、Advanced Battery Materials and Technologies

Aqueous rechargeable manganese (Mn)-ion batteries have recently emerged as a promising candidate for multivalent ion rechargeable batteries. However, challenges remain, particularly in expanding the electrolyte’s voltage window and identifying compatible anode materials. Herein, we introduce a Mn-ion full battery comprising a nickel hexacyanoferrate (NiHCF) cathode, a perylene-3,4,9,10-tetracarboxylic diimide (PTCDI) anode, and a novel hydrated eutectic electrolyte formulated from Mn(ClO 4 ) 2 ·6H 2 O and acetamide. This electrolyte composition, optimized for molar ratio, provides a stable solvation structure that suppresses water reactivity and supports high ionic conductivity, as confirmed by spectroscopic and molecular dynamics analyses. The PTCDI anode facilitates highly reversible Mn 2+ storage via a unique enolization redox reaction, delivering exceptional rate capability and cycling stability. As a result, the NiHCF||PTCDI full battery achieves a 1.2 V plateau, excellent rate performance (up to 5.0 A g –1 ), and long cycling life with 95.6% capacity retention over 1200 cycles at 1.0 A g –1 . This study proposes a feasible strategy for the construction of environment-friendly, long-life and low-cost aqueous Mn-ion full batteries, offering a sustainable and high-performance solution for future energy storage applications.