Revisiting Li+ intercalation into various crystalline phases of Nb2O5 anchored on graphene sheets as pseudocapacitive electrodes
By Kong, Lingping; Cao, Xiaodong; Wang, Jitong; Qiao, Wenming; Ling, Licheng; Long, Donghui
Published in Journal of Power Sources
NULL
2016
Abstract
Abstract Herein, polycrystalline Nb2O5 nanoparticles including pseudo-hexagonal (TT-), orthorhombic (T-), tetragonal (M-) and monoclinic (H-) phases are uniformly anchored onto graphene sheets through a polyol-mediated solvothermal reaction and post heat-treatment, enabling us to discuss the effect of Nb2O5 crystalline phases on Li+ intercalation process. Electrochemical results show that Li+ intercalation into M- and H-Nb2O5 are also capacitive behavior, exhibiting higher capacity of 650 C g?1 and 615 C g?1 than T- and TT-phases of 585 C g?1 and 530 C g?1 at 0.5 A g?1. The higher capacity-retention is also obtained for M- and H-phases (509 and 452 C g?1) compared to T- and TT-phases (305 and 207 C g?1) at 20 A g?1. The high rate performance of H-phase can be explained by higher Li+ diffusion coefficients (DLi) of 1.6
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.