Boosting Li–O 2 Battery Performance via Coupling of P–N Site‐Rich N, P Co‐Doped Graphene‐Like Carbon Nanosheets with Nano‐CePO 4

作者：Di Wu, Shan Wu, Genlei Zhang, Chenyang Hui, Dongjie Cao, Shiyu Guo, Huajie Feng, Qi Wang, Sheng Cheng, Peng Cui, Zhenzhen Yang · 发表于：Small · 年份：2023 · DOI：10.1002/smll.202206455 · 被引用次数：13 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、MXene and MAX Phase Materials

Abstract Development of efficient and robust cathode catalysts is critical for the commercialization of Li‐O 2 batteries (LOBs). Herein, a well‐designed CePO 4 @N‐P‐CNSs cathode catalyst for LOBs via coupling P‐N site‐rich N, P co‐doped graphene‐like carbon nanosheets (N‐P‐CNSs) with nano‐CePO 4 via a novel “in situ derivation” coupling strategy by in situ transforming the P atoms of P‐C sites in N‐P‐CNSs to CePO 4 is reported. The CePO 4 @N‐P‐CNSs exhibit superior bifunctional ORR/OER activity relative to commercial Pt/C‐RuO 2 with an overall overpotential of 0.64 V (vs RHE). Moreover, the LOB with CePO 4 @N‐P‐CNSs as the cathode catalyst delivers a low charge overpotential of 0.67 V (vs Li/Li + ), high discharge capacity of 29774 mAh g −1 at 100 mA g −1 and long cycling stability of 415 cycles, respectively. The remarkably enhanced LOB performance is attributable to the in situ derived CePO 4 nanoparticles and the P‐N sites in N‐P‐CNSs, which facilitate increased bifunctional ORR/OER activity, promote the rapid and effective decomposition of Li 2 O 2 and inhibit the formation of Li 2 CO 3 . This work may provide new inspiration for designing efficient, durable, and cost‐effective cathode catalysts for LOBs.