INORGANIC OXIDE POWDER FOR USE IN GEL ELECTROLYTE OF BATTERY AND GEL COMPOSITION CONTAINING INORGANIC OXIDE POWDER

摘要

An inorganic oxide powder for use in gel electrolyte of battery, which exhibits an average primary particle diameter of 5 to 40 nm and a possibility of presence of 100 mum or larger agglomerates of 1% or less. Preferably, the hydrophobic degree of the inorganic oxide powder is 50% or higher. Preferably, the inorganic oxide powder consists of silica powder, alumina powder, titania powder or a mixture thereof. The gel composition containing this inorganic oxide powder exhibits a thixotropy index of 6.0 or higher. Preferably, the dynamic elasticity (D30) thereof containing the inorganic oxide powder in an amount of 30 wt.% or more is 10000 Pa or greater. A gel electrolyte for battery that excels in workability and shape retention can be obtained from this gel composition.