NOVELTY - A material comprises poorly conducting active material of relatively low conductivity having regular or irregular passages with average cross-sectional dimensions of 5 mu m to 200nm and interconnected mesopores having average cross-sectional dimensions of 2-50 nm and active material is covered with network of electronically conductive metal oxide of relatively high conductivity extending into mesopores.    USE - In electrochemical device or supercapacitors such as an electrochemical cell, storage battery supercapacitor, fuel cell or photoelectrochemical device (all claimed).    ADVANTAGE - The material containing active material which is covered with network of electronically conductive metal oxide of relatively high conductivity extending into mesopores; the material has high power and high energy.    DETAILED DESCRIPTION - A material comprises poorly conducting active material of relatively low conductivity having regular or irregular passages with average cross-sectional dimensions of 5 mu m to 200nm and interconnected mesopores having average cross-sectional dimensions of 2-50 nm and active material is covered with network of electronically conductive metal oxide of relatively high conductivity extending into mesopores. A material further comprises particles of a conductive material dispersed in active material and present in passages. The active material is present in form of agglomeration of mesoporous grains or generally spherical mesoporous bodies of active material with passages. The active material is selected from TiO2, LiFePO4, Li4Ti5O12, V2O5, LiCoO2, LiMn2O4, LiCoxNiyMn(1 -x-y)O2 (where x, y and x+y are 0-1), LiMnPO4. The electronically conducting metal oxide is selected from RuO2, IrO2, VO2, MoO2, WO2, CO3O4 and Fe3O4. The particles of conductive material comprise carbon black. The active material comprises spherical mesoporous grains of one of TiO2 and LiFePO4 having diameter of 400-2000nm with mesopores with a conducting network of crystalline RuO2 coating the grains and extending inside the mesopores, with the proportion of RuO2 to TiO2 is in the range from 4-20 wt.%, with particles of carbon black is interspersed with mesoporous grains and located in passages and with the proportion of carbon black lying of 10-30 wt.% of combined weight of TiO2 and RuO2. An INDEPENDENT CLAIM is included for making a material involving preparation of poorly conducting active material of relatively low conductivity having regular or irregular passages and interconnected mesopores, and the active material.