| Autor: |
Xin Zhou, FeiFei Hong, Shuo Wang, Tian Zhao, Jiali Peng, Bin Zhang, Weifeng Fan, Wangyan Xing, Meihua Zuo, Ping Zhang, Yuhuan Zhou, Genpin Lv, Yanjun Zhong, Weibo Hua, Wei Xiang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
eScience, Vol 4, Iss 6, Pp 100276- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2667-1417 |
| DOI: |
10.1016/j.esci.2024.100276 |
| Popis: |
Microstructure engineering serves as a potent approach to counteract the mechanical deterioration of Ni-rich layered cathodes, stemming from anisotropic strain during Li+ (de)intercalation. However, a pressing challenge persists in devising a direct method for fabricating radially aligned cathodes utilizing oriented hydroxide precursors. In this study, we synthesized LiNi0.92Co0.04Mn0.04O2 oxides boasting superior radially aligned, size-refined primary particles through a combination of strategic precipitation regulation and lithiation tuning. Elongated primary particles, achieved by stepwise control of ammonia concentration and pH during particle growth, facilitate the formation of radially aligned hydroxide precursor particles. Leveraging the size-refined and radially aligned primary particles, our prepared LiNi0.92Co0.04Mn0.04O2 cathode exhibits a high discharge capacity of 229 mAh g−1 at 0.05 C, alongside excellent cycle stability, retaining 93.3% capacity after 200 cycles at 0.5 C (30 °C) in a half cell, and 86.4% capacity after 1000 cycles at 1 C (30 °C) in a full cell. Revisiting the regulation from precursor to oxide underscores the significance of controlling primary particles to maximize size perpendicular to [001] and attain suitable size along [001] during precursor precipitation and high-temperature calcination, offering valuable insights for synthesizing high-performance Ni-rich cathodes. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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