文献类型：期刊文献

英文题名：An iron formate framework with mixed-valence metal active sites as a promising anode material for stable Li-storage

作者：Du, Yijun[1];Guo, Weihua[2];Qi, Chenze[1];Wang, Chengxin[2]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing, Peoples R China;[2]Sun Yat Sen Zhongshan Univ, Sch Mat Sci & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

年份：2023

卷号：350

外文期刊名：MATERIALS LETTERS

收录：SCI-EXPANDED(收录号：WOS:001047278000001)、、EI(收录号：20233114458957)、Scopus(收录号：2-s2.0-85165882558)、WOS

基金：Acknowledgment This work is financially supported by the National Natural Science Foundation of China (91963210) .

语种：英文

外文关键词：Framework; Mixed-valence; Li-storage; Reversible conversion

外文摘要：Metal organic frameworks (MOFs) with metal active sites of mixed-valence are still less studied for Li-storage, especially for the anode. We present the Li-storage performance of a formate framework with both Fe(II) and Fe(III) as active sites. It delivered an impressive reversible capacity of & AP;920 mAh/g at 50 mA g-1, good rate performance of 683 mAh/g at 500 mA g-1, and long-term cycling stability of 500 cycles with 73% capacity retention. Reversible structure conversion accompanying self-nano-crystallization at certain crystal directions accounts for the good cycling stability and progressively improved rate performance.