Synthesis and Li + Ion Exchange in Molten Salts of Novel Hollandite-Type K y (Mn 1 − x Co x )O 2 · z H 2 O Nanofiber for Lithium Battery Electrodes
作者： Y. Kadoma , N. Kumagai
DOI: 10.1016/B978-0-12-398538-5.00018-4
关键词: Lithium oxide 、 Hollandite 、 Ion exchange 、 Lithium battery 、 Molten salt 、 Aqueous solution 、 Lithium 、 Chemistry 、 Inorganic chemistry 、 Qualitative inorganic analysis
摘要: Abstract Hollandite-type α-MnO2 and its Co-substituted Ky(Mn1 − xCox)O2 (x = 0-0.15) nanofibers have been synthesized by the oxidation of MnSO4 CoSO4 aqueous solutions with oxidizing agent K2S2O8 at 80-150 °C. The Li+ ion-exchange reaction K+-type α-K0.14MnO1.93·nH2O containing different amounts structural water molecules (n = 0-0.15) in large [2 × 2] tunnel Co-doped α-K0.14(Mn0.85Co0.15)O1.96·0.21H2O investigated a LiNO3-LiCl molten salt 300 °C. K+ ions hydrogens tunnels samples were exchanged salt, resulting Li+-type lithium oxide (Li2O) maintaining original hollandite structure. ion-exchanged as new cathode materials for rechargeable batteries provided higher capacities ion diffusivity than parent on initial discharge charge-discharge cyclings, probably due to stabilization existence Li2O Co-substitution.
sci-hub.se 参考文章(38)
S.-T. Myung, N. Kumagai, S. Komaba, H.-T. Chung, Preparation and electrochemical characterization of LiCoO2 by the emulsion drying method Journal of Applied Electrochemistry. ,vol. 30, pp. 1081- 1085 ,(2000) , 10.1023/A:1004042604318
Qi Feng, Tohru Horiuchi, Taikou Mitsusio, Kazumichi Yanagisawa, Nakamichi Yamasaki, Hydrothermal soft chemical synthesis of NH4+ form of hollandite-type manganese oxide Journal of Materials Science Letters. ,vol. 18, pp. 1375- 1378 ,(1999) , 10.1023/A:1006650819240
Y. Shao‐Horn, S. A. Hackney, C. S. Johnson, M. M. Thackeray, Microstructural Features of α ‐ MnO2 Electrodes for Lithium Batteries Journal of The Electrochemical Society. ,vol. 145, pp. 582- 589 ,(1998) , 10.1149/1.1838307
Li Guohua, H. Ikuta, T. Uchida, M. Wakihara, The Spinel Phases LiM y Mn2 − y O 4 (M = Co, Cr, Ni) as the Cathode for Rechargeable Lithium Batteries Journal of The Electrochemical Society. ,vol. 143, pp. 178- 182 ,(1996) , 10.1149/1.1836405
J. M. Tarascon, E. Wang, F. K. Shokoohi, W. R. McKinnon, S. Colson, THE SPINEL PHASE OF LIMN2O4 AS A CATHODE IN SECONDARY LITHIUM CELLS Journal of The Electrochemical Society. ,vol. 138, pp. 2859- 2864 ,(1991) , 10.1149/1.2085330
W. F. Cole, A. D. Wadsley, Allan Walkley, An X-Ray Diffraction Study of Manganese Dioxide Transactions of The Electrochemical Society. ,vol. 92, pp. 133- 158 ,(1947) , 10.1149/1.3071811
Naoaki Kumagai, Satoru Oshitari, Shinichi Komaba, Yoshihiro Kadoma, Synthesis of hollandite-type LiyMn1-xCoxO2 (x = 0-0.15) by Li+ ion-exchange in molten salt and the electrochemical property for rechargeable lithium battery electrodes Journal of Power Sources. ,vol. 174, pp. 932- 937 ,(2007) , 10.1016/J.JPOWSOUR.2007.06.221
S Bach, JP Pereira-Ramos, N Baffier, A new MnO2 tunnel related phase as host lattice for Li intercalation Solid State Ionics. ,vol. 80, pp. 151- 158 ,(1995) , 10.1016/0167-2738(95)00133-Q
Alexander Frank . Wells, Structural inorganic chemistry ,(1945)
Seung-Taek Myung, Shinichi Komaba, Naoaki Kumagai, Hydrothermal synthesis and electrochemical behavior of orthorhombic LiMnO2 Electrochimica Acta. ,vol. 47, pp. 3287- 3295 ,(2002) , 10.1016/S0013-4686(02)00248-7