MANUFACTURE OF NEGATIVE ELECTRODE MATERIAL FOR POLYMER SOLID ELECTROLYTE BATTERY

摘要

PURPOSE:To provide a negative electrode material for a polymer solid electrolyte battery, capable of enhancing wetting capability of edge surface of graphite with a polymer solid electrolyte. CONSTITUTION:Graphite powder is immersed in concentrated nitric acid to oxidize the edge surface of the graphite powder. The graphite powder 5 is immersed in a nonaqueous electrolyte 6 in which an alkali metal (lithium) is dissolved, and edge surface of the graphite powder 5 is reduced by electrically connecting the graphite powder 5 to a negative terminal of a charge/discharge power source 1 and by using a lithium metal sheet (alkali metal) 4 electrically connected to a positive terminal of the charge/discharge power source 1 as a counter electrode. Then the edge surface of the graphite powder 5 is oxidized by electrically connecting the graphite powder 5 to the positive terminal of the charge/discharge power source 1 and electrically connecting the lithium metal sheet 4 to the negative terminal of the charge/discharge power source 1.