Synthesis of 0.3Li2MnO3·0.7LiNi1/3Co1/3Mn1/3O2 cathode materials using 3-D urchin-like MnO2 as precursor for high performance lithium ion battery

Abstract

In the paper, we report synthesis of lithium rich layered oxide 0.3Li 2 MnO 3 Á0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 by using an urchin-like MnO 2 as precursor. The influences of calcination temperatures on the structures and electrochemical performances of asprepared materials are systematically studied. The results show that the obtained sample can partially retain the morphology of urchin-like precursor especially at low temperature, and a higher calcination temperature helps to improve the layered structure and particle size. As lithium ion battery cathodes, the 750°C sample with the size of 100-200 nm reveals an optimal electrochemical performance. The initial discharge capacity of 234.6 mAh g -1 with high Coulombic efficiency of 84.6 % can be reached at 0.1C within 2.0-4.7 V. After 50 cycles, the capacity retention can reach 90.2 % at 0.5C. Even at high current density of 5C, the sample also shows a stable discharge capacity of 120.5 mAh g -1 . Anyways, the urchin-like MnO 2 directed route is suitable to prepare 0.3Li 2 MnO 3 Á0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 as lithium ion battery cathode.

Porous ZnMnO 3 plates prepared from Zn/Mn–sucrose composite as high‐performance lithium‐ion battery anodes

“…Subsequently, the huge weight loss of about 47.6% with an exothermic peak of 283.1°C is the combustion of residual sucrose and other organic (originated from sucrose). Interestingly, a minor weight loss occurs nearby 450°C may be the further phase transformation of metal oxides [23].…”

Rechargeable Li-ion full batteries based on one-dimensional Li-rich Li1.13Mn0.26Ni0.61O2cathode and nitrogen-doped carbon-coated NiO anode materials

“…This in turn enables the LMO@LNO NWs to manifest better electrochemical characteristics than pristine LNO, with respect to high charge/discharge capacity, cycling stability, and rate performance. 38 The electrochemical performances of the 1D LMO@LNO cathode were compared with those of other Li-rich cathode oxides previously described in the literature reports in Table S1 † 48–50 . In order to further enhance the structural stability of our LMO@LNO, our future work will be focused on the structural modifications such as heteroatom doping, surface coating, and electrolyte optimization.…”

“…38 The electrochemical performances of the 1D LMO@LNO cathode were compared with those of other Li-rich cathode oxides previously described in the literature reports in Table S1. † [48][49][50] In order to further enhance the structural stability of our LMO@LNO, our future work will be focused on the structural modifications such as heteroatom doping, surface coating, and electrolyte optimization. 51-53…”

Urea‐assisted combustion synthesis of porous Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 microspheres as high‐performance lithium‐ion battery cathodes

“…LLOs cathodes), the construction of cathode materials with specific structures is also important. The porous microspheres composed of nanoparticle should be a good example [9][10][11][12][13]. First, the sphere-like structure can keep stable during cycling.…”

“…Generally, the spherical LLOs can be prepared by the template directed route. Therein, an initial preparation of sphere-like templates such as metal hydroxides, metal carbonates, MnO 2 or manganese carbonate [9][10][11][12][13] and subsequent high-temperature calcination with Li salts is necessary. In comparison, a combustion route would cost less time and raw materials if the sphere-like LLOs can be produced [15] 3.6535 g of urea were totally dissolved into a 5 ml distill water, and then the mixed solution was annealed at 450°C for 40 min.…”