Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Bioinspired Catechol-Grafting PEDOT Cathode for an All-Polymer Aqueous Proton Battery with High Voltage and Outstanding Rate Capacity
Advanced Science ( IF 14.3 ) Pub Date : 2021-12-16 , DOI: 10.1002/advs.202103896 Meihua Zhu 1 , Li Zhao 2 , Qing Ran 3 , Yingchao Zhang 1 , Runchang Peng 2 , Geyu Lu 2 , Xiaoteng Jia 2 , Danming Chao 1 , Caiyun Wang 4
Advanced Science ( IF 14.3 ) Pub Date : 2021-12-16 , DOI: 10.1002/advs.202103896 Meihua Zhu 1 , Li Zhao 2 , Qing Ran 3 , Yingchao Zhang 1 , Runchang Peng 2 , Geyu Lu 2 , Xiaoteng Jia 2 , Danming Chao 1 , Caiyun Wang 4
Affiliation
|
Aqueous all-polymer proton batteries (APPBs) consisting of redox-active polymer electrodes are considered safe and clean renewable energy storage sources. However, there remain formidable challenges for APPBs to withstand a high current rate while maximizing high cell output voltage within a narrow electrochemical window of aqueous electrolytes. Here, a capacitive-type polymer cathode material is designed by grafting poly(3,4-ethylenedioxythiophene) (PEDOT) with bioinspired redox-active catechol pendants, which delivers high redox potential (0.60 V vs Ag/AgCl) and remarkable rate capability. The pseudocapacitive‑dominated proton storage mechanism illustrated by the density functional theory (DFT) calculation and electrochemical kinetics analysis is favorable for delivering fast charge/discharge rates. Coupled with a diffusion-type anthraquinone-based polymer anode, the APPB offers a high cell voltage of 0.72 V, outstanding rate capability (64.8% capacity retention from 0.5 to 25 A g−1), and cycling stability (80% capacity retention over 1000 cycles at 2 A g−1), which is superior to the state-of-the-art all-organic proton batteries. This strategy and insight provided by DFT and ex situ characterizations offer a new perspective on the delicate design of polymer electrode patterns for high-performance APPBs.
中文翻译：
用于具有高电压和出色倍率容量的全聚合物水系质子电池的仿生儿茶酚接枝PEDOT正极
由氧化还原活性聚合物电极组成的水性全聚合物质子电池（APPB）被认为是安全、清洁的可再生能源存储来源。然而，APPB 仍然面临着巨大的挑战，要承受高电流速率，同时在水性电解质的狭窄电化学窗口内最大化高电池输出电压。这里，通过将聚（3,4-乙撑二氧噻吩）（PEDOT）与仿生氧化还原活性儿茶酚吊坠接枝来设计电容型聚合物阴极材料，该材料具有高氧化还原电位（0.60 V vs Ag/AgCl）和卓越的倍率性能。密度泛函理论（DFT）计算和电化学动力学分析说明的赝电容主导的质子存储机制有利于提供快速的充电/放电速率。与扩散型蒽醌基聚合物阳极相结合，APPB 可提供 0.72 V 的高电池电压、出色的倍率性能（0.5 至 25 A g -1 的容量保持率为 64.8%）和循环稳定性（超过 80% 的容量保持率）。在2 A g -1 )下循环1000次，优于最先进的全有机质子电池。DFT 和非原位表征提供的这种策略和见解为高性能 APPB 的聚合物电极图案的精细设计提供了新的视角。
更新日期：2022-02-10
中文翻译：
用于具有高电压和出色倍率容量的全聚合物水系质子电池的仿生儿茶酚接枝PEDOT正极
由氧化还原活性聚合物电极组成的水性全聚合物质子电池（APPB）被认为是安全、清洁的可再生能源存储来源。然而，APPB 仍然面临着巨大的挑战，要承受高电流速率，同时在水性电解质的狭窄电化学窗口内最大化高电池输出电压。这里，通过将聚（3,4-乙撑二氧噻吩）（PEDOT）与仿生氧化还原活性儿茶酚吊坠接枝来设计电容型聚合物阴极材料，该材料具有高氧化还原电位（0.60 V vs Ag/AgCl）和卓越的倍率性能。密度泛函理论（DFT）计算和电化学动力学分析说明的赝电容主导的质子存储机制有利于提供快速的充电/放电速率。与扩散型蒽醌基聚合物阳极相结合，APPB 可提供 0.72 V 的高电池电压、出色的倍率性能（0.5 至 25 A g -1 的容量保持率为 64.8%）和循环稳定性（超过 80% 的容量保持率）。在2 A g -1 )下循环1000次，优于最先进的全有机质子电池。DFT 和非原位表征提供的这种策略和见解为高性能 APPB 的聚合物电极图案的精细设计提供了新的视角。
京公网安备 11010802027423号