过电位
材料科学
甲酸
水溶液
格式化
双功能
纳米孔
电池(电)
电化学
无机化学
化学工程
电极
纳米技术
催化作用
物理化学
有机化学
化学
功率(物理)
热力学
工程类
物理
作者
Hairong Xue,Hao Gong,Xueyi Lu,Bin Gao,Tao Wang,Jianping He,Yusuke Yamauchi,Takayoshi Sasaki,Renzhi Ma
标识
DOI:10.1002/aenm.202101630
摘要
Abstract Li‐CO 2 batteries (LCOBs) are considered to be an important strategy toward efficient carbon sequestration and energy storage. However, most typical discharge products (Li 2 CO 3 and C) are insoluble and chemically stable, and require a high charge overpotential (≈3.5–4.5 V) to be decomposed. Herein, a novel aqueous LCOB with formic acid (HCOOH) as the discharge product is proposed. The soluble HCOOH can be directly utilized in the charge process without any further purification or compression, realizing a very facile electrochemical cycle. Nanoporous Pd films with a high electrochemical surface area exhibit a high bifunctional performance toward both CO 2 reduction and formic acid oxidation. Accordingly, the assembled LCOB achieves a high working potential plateau of 2.61 V whereas the charge potential is significantly lowered to 2.87 V, delivering the highest energy efficiency of 91%. The present work demonstrates a brand‐new aqueous LCOB with HCOOH as the discharge product for utilizing CO 2 as power source.
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