In Situ Grown CoMn2O4 3D-Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems,Small

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In Situ Grown CoMn2O4 3D-Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems
Small ( IF 13.0 ) Pub Date : 2021-10-22 , DOI: 10.1002/smll.202103613
Gnanaprakasam Janani ₁ , Subramani Surendran ₁ , Hyeonuk Choi ₁ , Mi-Kyung Han _{1,

2} , Uk Sim _{1,

2}

Affiliation

The integration of energy conversion and storage systems such as electrochemical water splitting (EWS) and rechargeable zinc–air battery (ZAB) is on the vision to provide a sustainable future with green energy resources. Herein, a unique strategy for decorating 3D tetragonal CoMn₂O₄ on carbon cloth (CMO–U@CC) via a facile one-pot in situ hydrothermal process, is reported. The highly exposed morphology of 3D tetragons enhances the electrocatalytic activity of CMO–U@CC. This is the first demonstration of such a bifunctional activity of CMO–U@CC in an EWS system; it achieves a nominal cell voltage of 1.610 V @ 10 mA cm⁻². Similarly, the fabricated rechargeable ZAB delivers a specific capacity of 641.6 mAh g_zn⁻¹, a power density of 135 mW cm⁻², and excellent cyclic stability (50 h @ 10 mA cm⁻²). Additionally, a series of flexible solid-state ZABs are fabricated and employed to power the assembled CMO–U@CC-based water electrolyzer. To the best of the authors’ knowledge, this is the first demonstration of an in situ-grown binder-free CMO–U@CC as a flexible multifunctional electrocatalyst for a built-in integrated rechargeable ZAB-powered EWS system.

中文翻译：

在碳布上原位生长的 CoMn2O4 3D-四边形：用于高效可充电锌-空气电池供电的水分解系统的柔性电极

电化学水分解 (EWS) 和可充电锌空气电池 (ZAB) 等能量转换和存储系统的集成旨在为可持续的未来提供绿色能源。在此，报道了一种通过简单的单锅原位水热法在碳布（CMO-U@CC）上装饰 3D 四方 CoMn ₂ O ₄的独特策略。3D四边形的高度暴露形态增强了CMO-U@CC的电催化活性。这是在 EWS 系统中首次展示 CMO-U@CC 的这种双功能活动；它实现了 1.610 V @ 10 mA cm ^-2的标称电池电压。同样，制造的可充电 ZAB 的比容量为 641.6 mAh g _zn^-1，135 mW cm ^-2的功率密度和出色的循环稳定性（50 h @ 10 mA cm ^-2）。此外，还制造了一系列灵活的固态 ZAB，并用于为组装的 CMO-U@CC 基水电解槽供电。据作者所知，这是首次展示原位生长的无粘合剂 CMO-U@CC 作为内置集成可充电 ZAB 供电 EWS 系统的灵活多功能电催化剂。

更新日期：2021-11-25

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