Morphology-controlled microwave-assisted solvothermal synthesis of high-performance LiCoPO4 as a high-voltage cathode material for Li-ion batteries

Enhanced Cycling Performance of Magnesium‐Doped Lithium Cobalt Phosphate

“…The morphology of as‐synthesised samples was investigated using scanning electron microscopy (SEM) (Figure a–d). LiCoPO 4 consists of sub‐micron hexagonal platelets with the thickness of 100–150 nm, consistent with the reports that the ethylene glycol/water co‐solvent system produces hexagonal platelets . The substitution of Mg for Co in LiCoPO 4 tends to enlarge particle size.…”

“…LiCo-PO 4 consists of sub-micron hexagonal platelets with the thickness of 100-150 nm, consistent with the reports that the ethylene glycol/water co-solvent system produces hexagonal platelets. [51,52] The substitution of Mg for Co in LiCoPO 4 tends to enlarge particle size. Large particles emerge from LiMg 0.10 Co 0.90 PO 4 while LiMg 0.05 Co 0.95 PO 4 shows little change.…”

Solvothermal water-diethylene glycol synthesis of LiCoPO4and effects of surface treatments on lithium battery performance

“…[25][26][27][28][29][30] However, use of LiCoPO 4 as a cathode in practical applications has been hindered by its unsatisfactory cycle stability and rate capability, which could be mainly attributed to its low electronic conductivity 17,[31][32][33][34][35][36] and poor Li + ionic conductivity [36][37][38][39][40][41] relating to the one-dimensional ion transport channels, 42 as well as to the decomposition of electrolytes under high potentials. 43 Efforts to overcome the low electronic and ionic conductivity of LiCoPO 4 have included: (1) size reduction and morphology control, decreasing the particle size of LiCoPO 4 or tailoring its crystal growth orientation along the a-c plane to decrease the diffusion length of lithium ions in the insertion/extraction process; 44,45 (2) surface modication (e.g. carbon coating), to enhance the electronic conductivity of the composite electrode by forming a conductive network among the LiCoPO 4 particles; 42,46 (3) ion doping with cations on either Li or Co sites to enhance the intrinsic electronic/ionic conductivity of LiCoPO 4 although the mechanism is still in controversy.…”

“…53,57 It is important to develop facile, easily scalable and controllable, time and energy saving synthetic routes to produce LiCoPO 4 with good electrochemical performance. 25 Various synthesis methods such as hydrothermal/solvothermal syntheses, 42,44 sol-gel processes 58,59 and solid-state reactions 60,61 have been proposed. Hydrothermal/solvothermal synthesis is facile and easily scalable, with mild reaction conditions and advantages of producing nanomaterials with controllable particle sizes and morphologies.…”

Efficient Microwave Irradiation‐Assisted Hydrothermal Synthesis of Ammonium Vanadate Flake

“…A new method of microwave irradiation has been applied in the synthesis of materials to obtain specific physical features in recent decades . Processes including selective heating and rapid heating have shown potential for solving problems of temperature consistency and composition uniformity .…”