文献类型：期刊文献

英文题名：High-Entropy O3-Phase Cathodes with Enhanced Diffusion Kinetics and Lattice Stability for High-Power Na-Ion Batteries

作者：Zhang, Chenke[1];Cheng, Qilin[1];Demir, Muslum[2];Chen, Ling[1];Yu, Haifeng[3];Jiang, Hao[1,3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：37

起止页码：18251

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20253819185796);WOS:【SCI-EXPANDED(收录号:WOS:001562955900001)】；

基金：This work was supported by the National Natural Science Foundation of China (22308103) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Binary alloys - Calcium compounds - Cathodes - Charging (batteries) - Copper compounds - Entropy - Ions - Iron compounds - Manganese compounds - Nickel compounds - Sodium compounds - Titanium compounds

摘要：O3-phase layered oxide cathodes have been considered as the most promising candidates for high-energy Na-ion batteries (SIBs) due to their high reversible specific capacity, yet the detrimental OP2 phase transition with severe c-axis contraction at high operating voltages hampers its power performance. Herein, we design and synthesize a novel high-entropy O3-phase cathodes, Na1.0(Ni0.4Fe0.2Mn0.4)0.83Zn0.06Cu0.01Ti0.08Ca0.02O2, with a configurational entropy of 1.53R. This high-entropy design significantly broadens the Na-ion diffusion channels and effectively mitigates c-axis contraction by stabilizing the lattice structure and suppressing phase transitions, thereby facilitating rapid Na-ion transport throughout the charge/discharge process. Consequently, the as-obtained cathode delivers a high specific capacity of 161.8 mAh g-1 at 0.1 C within 2.0-4.2 V and maintains a capacity of 122.1 mAh g-1 even at 5 C with a twofold improvement. In addition, 80.1% of initial capacity is retained after 100 cycles at 1 C, markedly higher than that of the counterpart (40.0%). These results highlight the critical role of high-entropy design in stabilizing the O3-phase cathodes for high-power SIBs.