School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
Angew Chem Int Ed Engl. 2018 Mar 5;57(11):2899-2903. doi: 10.1002/anie.201800363. Epub 2018 Feb 15.
Complex nanostructures with multi-components and intricate architectures hold great potential in developing high-performance electrode materials for lithium-ion batteries (LIBs). Herein, we demonstrate a facile self-templating strategy for the synthesis of metal vanadate nanomaterials with complex chemical composition of NiCo V O and a unique yolk-double shell structure. Starting with the Ni-Co glycerate spheres, NiCo V O yolk-double shell spheres are synthesized through an anion-exchange reaction of Ni-Co glycerate templates with VO ions, followed by an annealing treatment. By virtue of compositional and structural advantages, these NiCo V O yolk-double shell spheres manifest outstanding lithium storage properties when evaluated as anodes for LIBs. Impressively, an extra-high reversible capacity of 1228 mAh g can be retained after 500 cycles at a high current density of 1.0 Ag .
具有多组分和复杂结构的复杂纳米结构在开发高性能锂离子电池 (LIB) 电极材料方面具有巨大潜力。在此，我们展示了一种简便的自模板策略，用于合成具有 NiCoV O 复杂化学成分和独特蛋黄-双壳结构的金属钒酸盐纳米材料。从 Ni-Co 甘油酸盐球体开始，通过 Ni-Co 甘油酸盐模板与 VO 离子的阴离子交换反应，然后进行退火处理，合成了 NiCoV O 蛋黄-双壳球体。由于组成和结构的优势，这些 NiCoV O 蛋黄-双壳球体在用作 LIB 阳极时表现出优异的锂存储性能。令人印象深刻的是，在 1.0Ag 的高电流密度下循环 500 次后，仍可保持 1228mAhg 的额外超高可逆容量。
