Institute of Opto-Electronic Materials and Technology, South China Normal University, Guangzhou, 510631, P.R. China.
Guangdong Provincial Engineering Technology, Research Center for Low Carbon and Advanced Energy Materials, Guangzhou, 510631, P.R. China.
Chemistry. 2019 Apr 1;25(19):5043-5050. doi: 10.1002/chem.201806006. Epub 2019 Mar 6.
Nanoporous ZnMn O nanorods have been successfully synthesized by calcining β-MnO /ZIF-8 precursors (ZIF-8 is a type of metal-organic framework). If measured as an anode material for lithium-ion batteries, the ZnMn O nanorods exhibit an initial discharge capacity of 1792 mA h g at 200 mA g , and an excellent reversible capacity of 1399.8 mA h g after 150 cycles (78.1 % retention of the initial discharge capacity). Even at 1000 mA g , the reversible capacity is still as high as 998.7 mA h g after 300 cycles. The remarkable lithium-storage performance is attributed to the one-dimensional nanoporous structure. The nanoporous architecture not only allows more lithium ions to be stored, which provides additional interfacial lithium-storage capacity, but also buffers the volume changes, to a certain degree, during the Li insertion/extraction process. The results demonstrate that nanoporous ZnMn O nanorods with superior lithium-storage performance have the potential to be candidates for commercial anode materials in lithium-ion batteries.
纳米多孔 ZnMn O 纳米棒已通过煅烧 β-MnO/ZIF-8 前体（ZIF-8 是一种金属有机骨架）成功合成。如果将其作为锂离子电池的阳极材料进行测量，ZnMn O 纳米棒在 200 mA/g 的电流密度下具有 1792 mA h/g 的初始放电容量，在 150 次循环后具有 1399.8 mA h/g 的优异可逆容量（初始放电容量的 78.1%保持率）。即使在 1000 mA/g 的电流密度下，经过 300 次循环后，可逆容量仍高达 998.7 mA h/g。这种显著的储锂性能归因于一维纳米多孔结构。纳米多孔结构不仅允许更多的锂离子被储存，从而提供额外的界面储锂容量，而且还在一定程度上缓冲了锂离子插入/提取过程中的体积变化。研究结果表明，具有优异储锂性能的纳米多孔 ZnMn O 纳米棒有望成为锂离子电池商业阳极材料的候选材料。
