The electrolyte significantly affects the energy density, life, charge-discharge performance, operating temperature range, and safety performance of LiFePO4 batteries. The electrolyte is divided into three parts: solvent, electrolyte, and additive. The decomposition of solvents, electrolytes, and chemical reactions all lead to the loss of capacity in LiFePO4 batteries. With the continuous use of LiFePO4 batteries, this cannot be avoided.