Bi Ruyi, Xu Nan, Ren Hao, Yang Nailiang, Sun Yonggang, Cao Anmin, Yu Ranbo, Wang Dan
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083, P. R. China.
State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190, P. R. China.
Angew Chem Int Ed Engl. 2020 Mar 16;59(12):4865-4868. doi: 10.1002/anie.201914680. Epub 2020 Jan 29.
The lithium-ion capacitor (LIC) has attracted tremendous research interest because it meets both the requirement on high energy and power densities. The balance between effective surface areas and mass transport is highly desired to fabricate the optimized electrode material for LIC. Now, triple-shelled (3S) Nb O hollow multi-shelled structures (HoMSs) were synthesized for the first time through the sequential templating approach and then applied for the anode of LIC. The unique structure of HoMSs, such as large efficient surface area, hierarchical pores, and multiple shells, provides abundant reaction sites, decreases the electron transport resistance, and increases the diffusion rate for ion transport. In this case, the best combination performance has been achieved among all the reported Nb O -based materials, which delivered an excellent energy and power densities simultaneously, and superb cycling stability.
锂离子电容器（LIC）因其满足了对高能量密度和功率密度的要求而引起了极大的研究兴趣。为了制备用于LIC的优化电极材料，非常需要有效表面积和质量传输之间的平衡。现在，首次通过顺序模板法合成了三壳（3S）NbO中空多壳结构（HoMSs），并将其应用于LIC的阳极。HoMSs的独特结构，如大的有效表面积、分级孔隙和多层壳，提供了丰富的反应位点，降低了电子传输电阻，并提高了离子传输的扩散速率。在这种情况下，在所有已报道的基于NbO的材料中实现了最佳的综合性能，同时提供了优异的能量密度和功率密度以及出色的循环稳定性。
