文献类型：期刊文献

英文题名：Balanced coordination enables low-defect Prussian blue for superfast and ultrastable sodium energy storage

作者：Jiang, Mingwei[1,2];Hou, Zhidong[1,2];Wang, Jinjin[3];Ren, Lingbo[1,2];Zhang, Yu[4];Wang, Jian-Gan[1,2]

机构：[1]Northwestern Polytech Univ, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;[2]NPU, Shaanxi Joint Lab Graphene, Xian 710072, Peoples R China;[3]Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：102

外文期刊名：NANO ENERGY

收录：;EI(收录号：20223512627392);WOS:【SCI-EXPANDED(收录号:WOS:000861067100003)】；

基金：The work is supported by the National Natural Science Foundation of China (51772249, 22109044, and 51821091) , Fundamental Research Funds for the Central Universities (D5000210894 and 3102019JC005) . The authors also appreciate the TEM analysis from the Analytical & Testing Center of Northwestern Polytechnical University.

语种：英文

外文关键词：Prussian blue; Balanced coordination; High crystallinity; High-rate capability; Sodium-ion batteries

摘要：As a promising cathode material of sodium-ion batteries, the crystallinity of Prussian blue and its analogues (PB/PBA) is extremely pivotal for the electrochemical reaction kinetics and longevity. However, the controllable modulation of the PB/PBA crystallinity still remains an intractable challenge. Herein, we propose a balanced coordination principle to prepare low-defect Prussian blue (LD-PB) materials for outstanding sodium energy storage. Sodium carboxymethylcellulose is demonstrated as a moderate chelating agent to regulate the precipitation of LD-PB with negligible trace of vacancies and crystal water molecules. The high-crystalline open framework permits superfast and highly reversible sodium insertion/extraction. Impressively, an unprecedented specific capacity of 101 mAh g(-1) is achieved at an ultrahigh rate of 100 C in combination with remarkable capacity retention of 97.4% over a 3000-cycling test. The present study will shed a fundamental insight into the balanced coordination strategy for advancing the PB/PBA cathode materials toward superfast and durable alkali metal energy storage.