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Quenching-induced Fe doping on spent cathode materials enhances the oxygen evolution reaction performance
淬火誘導鐵摻雜提升廢棄正極材料的析氧反應性能


Gaige Zhang , Changchun Ye , Tan Li , Shumin Liu , Wei-Hsiang Huang , Zhaoxi Chen , Xiaochao Ren, Jiajin Lin , Jin Yang , Yongcai Qiu , Guangxu Chen*
https://doi.org/10.1016/j.ensm.2025.104430
SEED Member: Wei-Hsiang Huang

 

Overview of Ni-based S-scheme heterojunctions for photocatalytic CO₂ reduction with enhanced C₁ product selectivity.

 

Major Contributions
 

1.A three-step recycling strategy—acid etching, calcination, and Fe³⁺ quenching—repurposes spent LiCoO₂ into Fe-LCO/Co₃O₄ catalysts with enhanced surface area, defects, and active sites for OER. 

2.Fe-doped LCO/Co₃O₄ heterostructures optimize *OH and *O adsorption, reduce the energy barrier of the rate-determining *OOH dehydrogenation step, and accelerate OER kinetics, achieving low overpotential (312 mV at 10 mA cm⁻²), small Tafel slope (34 mV dec⁻¹), and >1000 h stability. 

3.Application in zinc-air batteries demonstrates superior performance and durability compared to commercial IrO₂, while the strategy is extendable to other spent cathodes (SNCM, SLFP), offering a sustainable pathway for high-value electrocatalyst production.




主要貢獻
 

1.三步回收策略轉化廢料:提出了一種包含酸蝕(acid etching)、鍛燒與 Fe3+ 淬火的三步回收策略,將廢棄的 LiCoO2 電池正極轉化為 Fe-LCO/Co3O4 催化劑,顯著增加了表面積、缺陷結構與 OER 活性位點。

2.異質結構優化反應動力學:Fe 摻雜 LCO/Co3O4 異質結構優化了 *OH 與 *O 中間體的吸附,降低了速率決定步驟(*OOH 脫氫)的能壘,進而加速析氧反應(OER)動力學。該材料展現了優異的電化學性能:低過電位: 10 mA cm-2 時僅需 312 mV。低塔菲爾斜率: 34 mV dec-1。超長壽命: 穩定性超過 1000 小時。

3.鋅空氣電池應用與廣泛適用性:在鋅空氣電池(Zinc-Air batteries) 應用中,其性能與耐用度均優於商用 IrO2。此外,此策略具備通用性,可推廣至其他廢棄正極材料(如 SNCM、SLFP),為高價值電催化劑的生產提供了一條永續途徑。