Kim Jongkyoung, Yu Je Min, Choi Jun-Yong, Lee Seong-Hun, Lee Han Uk, Oh Dongrak, Go Hyunju, Jang Wonsik, Lee Seunghyun, Cho Jaewon, Cho Sung Beom, Shin Tae Joo, Lee Hyunjoo, Lee Sang-Goo, Jang Ji-Wook, Cho Seungho, Jo Wook
Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
Adv Sci (Weinh). 2025 Jul 28:e06172. doi: 10.1002/advs.202506172.
Efficient and robust bifunctional electrocatalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are critical for high-performance zinc-air batteries (ZABs). However, balancing OER and ORR activity in a single catalyst remains challenging due to the different mechanisms during charging and discharging. Here, a scalable strategy is presented for enhancing both reactions by integrating two-dimensional OER- and ORR-active components onto a carbon-based conductive substrate with abundant anchoring sites, via high-shear exfoliation. The heterostructure catalyst demonstrates exceptional bifunctionality, achieving an extremely low overpotential difference of 0.63 V. First-principles calculations confirm a strong chemical compatibility between the active components and substrate. In scaled-up ZAB applications, the catalyst delivers a high peak power density of 1569 mW cm, and an outstanding cycling stability over 300 h (1800 cycles). This work highlights a versatile approach for designing multifunctional electrocatalysts, advancing scalable energy conversion and storage technologies.
用于析氧反应（OER）和氧还原反应（ORR）的高效且稳健的双功能电催化剂对于高性能锌空气电池（ZAB）至关重要。然而，由于充电和放电过程中的机制不同，在单一催化剂中平衡OER和ORR活性仍然具有挑战性。在此，提出了一种可扩展的策略，通过高剪切剥离将二维OER和ORR活性组分整合到具有丰富锚定位点的碳基导电基底上，以增强这两种反应。这种异质结构催化剂表现出卓越的双功能特性，实现了极低的0.63 V过电位差。第一性原理计算证实了活性组分与基底之间具有很强的化学相容性。在放大的ZAB应用中，该催化剂提供了1569 mW cm的高峰值功率密度，并在超过300小时（1800次循环）内具有出色的循环稳定性。这项工作突出了一种设计多功能电催化剂的通用方法，推动了可扩展的能量转换和存储技术的发展。
