Incorporating Fe into Bismuthic Anode Systems: A Smart “Merits Combination/Complementation” Route to Build Better Ni–Bi Batteries

• DOI: 10.1021/acsami.9b19815
• Publication Date: 2020-01-13T15:03:11Z
• Authors: Ning Li; Jianhui Zhu; Ting Meng; Lai Ma; Han Zhang; JiaJia Yao; Maowen Xu; Chang Ming Li; Jian Jiang
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

The advancement of Ni–Bi batteries has turned sluggish because impenetrable barriers related to physicochemical instability bismuthic species under thermal conditions. This directly makes Bi-based anodes impossible hybridize with graphitic carbons for a longer-term cyclic lifespan. To break this constraint, we herein propose an effective strategy by incorporating Fe into systems form multielement anodes. smart Bi/Fe merits combination/complementation can drastically promote the tolerable temperature Bi-containing nanomaterials over 500 °C, enabling carbon encapsulation without altering their geometric properties and in meantime endowing inherited electrochemical superiorities. as-built BiFeO3@carbon exhibit prominent electrode performances excellent activity (both Bi- Fe-based components act as faradaic redox reaction sites), rate capabilities, impressive capacity retention (∼83.4% after 2000 cycles). We further unveil anodic phase conversions "BiFeO3 → Bi2O3/Fe2O3" (via transition state Bi2O3(222)) based on real-time characterizations/post-analysis at distinct stages. packed full cells max. energy/power densities ∼90.72 W h kg–1/∼1.3 kW kg–1. Our study may offer promising engineering route development safe applicable near-future applications.