Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
Tham khảo tài liệu 'carbon alloys part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 334 Chapter 20 163. M.E. Merraoui M. Aoshima and K. Kaneko Micropore size distribution of activated carbon fiber using the density functional theory and other methods. Langmuir 16 4300-4304 2000. 64. T. Ohba T. Suzuki and K. Kaneko Relationship between DR-plot and micropore width distribution from GCMC simulation. Carbon 30 1879-1902 2000. 335 Chapter 21 Electrochemical Characterization of Carbons and Carbon Alloys Tsuyoshi Nakajima Department of Applied Chemistry Aichi Institute of Technology Toyota-shi 470-0392 Japan Abstract Fundamental techniques of electrochemistry i.e. cyclic voltammetry and galvanostatic methods for characterizing carbon materials are described. Examples of cyclic voltammograms and charge discharge curves are shown for carbon graphite and the carbon alloys BCX and CXN. The capacities are increased by boron and nitrogen substitution in graphene layers. The increase in the capacities of BCX and CXN result from formation of low SOMO and LUMO levels in graphene layers which enhance the chemical interaction of lithium with BCX and CXN. Keywords Cyclic voltammetry Galvanostatic method Carbon alloy CXN BCX Graphite intercalation compound. 1 Introduction One of the important uses of carbon materials is the application to battery materials i.e. primary and secondary batteries fuel cells etc. Various types of powdery fibrous or sintered carbon materials which are prepared from natural and synthetic graphites and graphitizable and non-graphitizable carbons are currently employed in batteries as electrode and electroconductive materials. Among many applications of carbon materials to batteries graphite intercalation compounds occupy a very important place in primary and secondary batteries. A typical example is the lithium graphite fluoride Li CF n battery which was developed at the beginning of 1970s by Matsushita Ind. Co. Ltd. in Japan 1-3 . This battery was the first to use metallic lithium as anode and to use organic solvents. After the development
