Controllable Morphology Tailoring with Solvothermal Method Toward LiMnPO4/C Cathode Materials for Improved Performance and Favorable Thermostability

An environmentally friendly method for the synthesis of LiMnPO4/C anode material lithium-ion batteries by solvothermal is introduced. The modification morphology this precursor altered changing ratio conditioning solvent (water-ethylene glycol solution) and order addition. Ethylene (EG) exerts a considerable influence on synthesizing flake-like nanocrystal, which benefits extraction/insertion reaction lithium ions improves electrochemical activity performance material. When composition H2O:EG = 1:3, exhibiting exceptional charge/discharge rate capability, specific discharge capacities are 155.8, 153.7, 148.8, 141.4, 129.5, 112.6 mAh g−1 at 0.1, 0.2, 0.5, 1, 2, 5 C rates, respectively. charge–discharge returns to 0.1 C, shows reversible capacity 153.7 g−1. Differential scanning calorimetry (DSC) tests verify that thermodynamic stability prepared LiMnPO4/C(LMP) commercial LiFePO4 (LFP)materials better than nickel–cobalt-aluminum (NCA) ternary materials. These composites have high cycle stability.