1results about How to "Improve sodium storage performance" patented technology

This invention discloses a method for preparing biomass hard carbon anode materials without acid washing, comprising the following steps: using pure water as a solvent, placing biomass particles in a Soxhlet extractor, continuously circulating and extracting the biomass particles under reflux conditions for 2-5 hours; after extraction, removing the solid and drying it to obtain water-extracted purified biomass; heating the obtained water-extracted purified biomass to 300-550°C at a heating rate of 2-10°C / min, holding it at this temperature for 2-5 hours, then naturally cooling it to room temperature, and then washing and drying it with pure water; heating the obtained pre-oxidized carbonized product to 1100-1550°C at a heating rate of 2-10°C / min, holding it at this temperature for 3-6 hours, and then naturally cooling it to room temperature; washing the obtained carbonized product with pure water until the filtrate is neutral, and then drying it. Compared with the prior art, this method solves the problems of serious wastewater pollution, significant safety hazards, high costs, long production cycles, and the easy introduction of oxygen-containing defects that damage electrochemical performance.