The invention discloses a method for preparing a high-
conductivity carbon material by virtue of a hydrothermal method. The method is characterized by comprising the following steps: by taking
carboxymethyl cellulose as a
raw material and taking pure water as a
solvent, performing one-step high-temperature high-pressure
hydrothermal treatment on a
doping nitrogen source, and performing
centrifugal separation, thereby obtaining a deep brown
solid product; washing the brown
solid product until the filtrate is clarified by using
distilled water and absolute ethyl
alcohol, performing
vacuum drying, and performing high-temperature activation and
pyrolysis on the obtained product, thereby obtaining a
graphite-like structure carbon material with
high nitrogen doping content and developed porous structure, wherein the carbon material has
high conductivity and has potential application values in the field of preparation of
lithium ion batteries and super-capacitors. The operation process has the main characteristics that the
carboxymethyl cellulose is taken as the
raw material and is environment-friendly, low in price and readily available, the
nitrogen source is doped into carbon in the form of functional groups such as amino, pyridone and
pyridine after the
hydrothermal reaction and is subjected to high-temperature activation treatment so as to exist in a stable
graphite nitrogen form, the
graphite-like structure carbon material with high specific surface area and developed porous structure is generated, and
high conductivity is promoted. The
nitrogen source and the activation conditions are changed, so that carbon materials of different
nitrogen doping amounts and pore structures can be controlled to be prepared, the
conductivity is further adjusted, the highest
conductivity of the
prepared material can reach 120-166Sm<-1>, the method is simple and performance is excellent.