▎ 摘　　要

NOVELTY - Electrode comprises a current collector and an active material layer disposed on at least one surface of current collector, where the active material layer is subjected to thermogravimetric analysis at a heating rate of 10℃/minutes under an inert atmosphere, and the result of thermogravimetric analysis shows that mass change of active material layer at 200-350℃ is 0-0.2%. The electrode is cathode. The active material layer includes conductive agent, where the conductive agent includes carbon nanotubes, carbon fibers, acetylene black, graphene, Ketjen black and/or conductive carbon black. The active material layer includes polymer compound. USE - The electrode is useful in electrochemical device and electronic device (all claimed). ADVANTAGE - The electrode: has 0-0.2% mass change of active material layer at 200-350℃ by thermogravimetric analysis, where active material layer subject to thermogravimetric analysis at heating rate of 10℃/minutes under an inert atmosphere; contains active material layer, which has good conductivity, increased thickness without deteriorating performance, and improved electric energy density. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: preparing electrode. electrochemical device. electronic device.