NOVELTY - An electrochemically active powder comprises particles containing a core which is provided with a coating layer, and contains transition metal-containing compound (I). The particles are at least partially coated by coating layer, and the coating layer comprises carbonaceous material including highly ordered graphite. The highly ordered graphite has a ratio (I1360/I1580) of peak intensity (I1360) at 1360 cm-1 to peak intensity (I1580) at 1580 cm-1, of 1.5-3.05, obtained by Raman spectrum analysis.    USE - Electrochemically active powder is used for forming electrode material for electrochemical cell for battery and devices e.g. portable electronic device, portable computer, tablet, mobile phone, electrically powered vehicle and energy storage systems (all claimed).    ADVANTAGE - The electrochemically active powder has excellent stability, and provides electrode having excellent discharge capacity, enhanced rate performance and cycling life, and reduced polarization effects during charging and discharging. The carbon-coated electrochemically active powder is manufactured by simple and economical method.    DETAILED DESCRIPTION - An electrochemically active powder comprises particles containing a core which is provided with a coating layer, and contains transition metal-containing compound of formula: LiaMm(XO4)n (I), Where M is at least one transition metal and optionally at least one non-transition metal, X is S, P or Si, a is 0-3.2, m is 0-2, and n is 1-3. The particles are at least partially coated by coating layer, and the coating layer comprises carbonaceous material including highly ordered graphite. The highly ordered graphite has a ratio (I1360/I1580) of peak intensity (I1360) at 1360 cm-1 to peak intensity (I1580) at 1580 cm-1, of 1.5-3.05, obtained by Raman spectrum analysis. INDEPENDENT CLAIMS are included for the following:    (1) electrode material, which comprises a composition containing electrochemically active powder and binder;    (2) electrochemical cell, which comprises at least two electrodes and at least one electrolyte, in which at least one of electrodes, is preferably the positive electrode; and    (3) manufacture of carbon-coated electrochemically active powder.