▎ 摘　　要

NOVELTY - The synthesis device comprises reaction chamber; two vacuum electrodes provided at two ends of reaction chamber and having one end extending into the reaction chamber and other end provided outside the reaction chamber; a pulse power supply connected with the outer ends of two vacuum electrodes; a precursor fixer arranged in the reaction chamber; and vacuum pump connected with the reaction chamber. The inner ends of two vacuum electrodes are connected with the reaction precursor on the precursor fixer. USE - The nanocomposite material synthesis device based on instantaneous high temperature joule heat method is used for preparing metal lithium-carbon/nano-metal composite material used as cathode material of metal lithium battery (claimed). ADVANTAGE - The device can control the reaction temperature and time by controlling the current application magnitude and pulse width by pulse current source. The prepared metal lithium-carbon/nano-metal composite electrode material has flexibility, high specific capacity, high rate performance, high cycle life and high safety. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a preparation method of metal lithium-carbon/nanometal composite material comprising soaking carbon-based precursor in ethanol solution of metal salt for 6-18 hours, separating and drying to obtain carbon-based precursor/metal salt composite material, cutting, placing in the nanocomposite material synthesis device based on instantaneous high temperature joule heating method, setting reaction parameter and introducing reaction atmosphere, reacting to obtaining carbon-nano-metal composite material, heating metal lithium under argon atmosphere to 300-400degrees Celsius to form molten state and mixing with carbon-nano-metal composite material at 300-400degrees Celsius, cooling, and taking out reaction product; (2) a metal lithium-carbon/nano-metal composite material.