Janani Gnanaprakasam, Surendran Subramani, Choi Hyeonuk, Han Mi-Kyung, Sim Uk
Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea.
Research Institute, NEEL Sciences, INC., Gwangju, 61186, South Korea.
Small. 2021 Nov;17(47):e2103613. doi: 10.1002/smll.202103613. Epub 2021 Oct 22.
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 CoMn O 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 . Similarly, the fabricated rechargeable ZAB delivers a specific capacity of 641.6 mAh g , a power density of 135 mW cm , and excellent cyclic stability (50 h @ 10 mA cm ). 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.
诸如电化学水分解（EWS）和可充电锌空气电池（ZAB）等能量转换与存储系统的整合，旨在实现利用绿色能源资源打造可持续未来的愿景。在此，报道了一种通过简便的一锅原位水热法在碳布上修饰三维四方相CoMn O（CMO-U@CC）的独特策略。三维四方相的高度暴露形态增强了CMO-U@CC的电催化活性。这是首次证明CMO-U@CC在EWS系统中具有这种双功能活性；在10 mA cm 时，其实现了1.610 V的标称电池电压。同样，所制备的可充电ZAB的比容量为641.6 mAh g ，功率密度为135 mW cm ，并具有出色的循环稳定性（在10 mA cm 下50小时）。此外，还制备了一系列柔性固态ZAB，并用于为组装好的基于CMO-U@CC的水电解槽供电。据作者所知，这是首次证明原位生长的无粘结剂CMO-U@CC作为一种柔性多功能电催化剂用于内置集成可充电ZAB供电的EWS系统。
