Controllable preparation of one-dimensional Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ cathode materials for high-performance lithium-ion batteries

Abstract

Li1.2Mn0.54Ni0.13Co0.13O2 rods with controllable sizes were synthesized via a co-precipitation route followed by a post-calcination treatment to improve rate capabilities.

Li1.2Mn0.54Ni0.13Co0.13O2 nanosheets with porous structure as a high-performance cathode material for lithium-ion batteries

“…The c/a values of the two samples are larger than 4.899 (the value of idea cubic close stacking), indicating an enhanced layered structure. 12 Additionally, the peak intensity ratios of I(003)/I(104) for the nanosheets and the agglomerated nanoparticles are 1.345 and 1.296, respectively, indicating that both of the samples have a good layered structure and a great cation arrangement between Li + and Ni 2+ . 23 The nitrogen adsorption-desorption isotherms of the nanosheets and the agglomerated nanoparticles are shown in Fig.…”

“…[6][7][8] It has been well acknowledged that the electrochemical properties of lithium-rich layered oxide cathode materials tightly depend on their morphologies and structures. [9][10][11][12] Therefore, numerous efforts have been made to control the morphologies and structures of lithium-rich layered oxide cathode materials for enhancing the rate capability, improving the capacity retention and reducing the voltage decay. For examples, porous Li[Li 0.19 Mn 0.32 Co 0.49 ]O 2 nanorods composed of about 20 nm subunit nanoparticles were synthesized by oxalates co-crystallization and subsequent calcination process, exhibiting the improved charge/discharge performances; 13 1D micro-and nanostructured manganese-based bars with differing aspect ratios and compositions were prepared by an ethanol-water mediated co-precipitation method coupled with a post-heat treatment, delivering an excellent reversible capacity and rate capability; 14 Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 nanowires were synthesized via a co-precipitation method followed by calcination steps, and achieved a high capacity and excellent capacity retention; 15 Li 1.140 Mn 0.622 Ni 0.114 Co 0.124 O 2 microspheres were fabricated by a solvothermal strategy followed by a moderate heat treatment, showing an impressive initial coulombic efficiency and high rate capability; 16 a hollow porous hierarchical 0.5Li 2 MnO 3 $0.5LiMn 0.4 Co 0.3 Ni 0.3 O 2 architecture with a delicate ower-like morphology was synthesized by a solvothermal method and subsequent calcination process, and displayed the exceptional electrochemical performance.…”