The application of lithium batteries in the military field is mainly aimed at individual combat systems. The battery for the individual combat system mainly considers the specific energy parameter and the specific power, which is the advantage of the lithium ion battery. The U.S. military divides the energy of individual combat systems into three levels: 20W, 100W, and 1kW, of which lithium-ion batteries are suitable for the needs of the 20W level. In the short-term plan of 3-5 years, the goal is to develop batteries that meet the 24-hour mission of individual soldiers. With a specific energy of 300W · h / kg or more, a lithium-ion battery / capacitor hybrid system may be used.

      The cathode materials can be divided into the following categories: transition metal oxides MOX, such as VOX, MoO3; transition metal sulfur (selenium, tellurium, etc.) compounds MSX, such as TiS2, VS2, etc .; lithiated transition metal oxides, further divided into layers according to the structure And spinel, such as LiCoO2, Li4Ti5O12, etc .; olivine structure phosphates, such as LiFePO4, LiCoPO4; transition metal fluorides, such as FeF3, whose potential lies within the chemical window of the electrolyte, does not react with the solvent, and reacts with LiFePO4 Similarly, no obvious surface layer will be formed; polyanionic phosphates, such as Li3V2P3O12, etc .; Nasicon silicates, borate, etc., such as LiFeBO3.

      As the positive electrode of lithium ion batteries, lithium cobalt oxide LiCoO2 and ternary material Li (Ni1 / 3Co1 / 3Mn1 / 3) O2 (333), LiNiyCo0.15A1XO2 (NCA, x = 0.05 or 0.03, y = 0.80 or 0.85) are mainly used. , Spinel LiMn2O4 (LMO) series, olivine LiFePO4 (LFP), if there is a suitable electrolyte system, high-pressure spinel LiMn1.5Ni0.5O4 (LMNO) will be immediately put into practical use.