Understanding the degradation mechanisms of LiNi 0.5Co 0.2Mn 0.3O 2 cathode material in lithium ion batteries. Insights into the inner structure of high-nickel agglomerate as high-performance lithium-ion cathodes. Oxygen release and its effect on the cycling stability of LiNi xMn 圜o zO 2 (NMC) cathode materials for Li-ion batteries. Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries. Surface reconstruction and chemical evolution of stoichiometric layered cathode materials for lithium-ion batteries. Analysis of the growth mechanism of coprecipitated spherical and dense nickel, manganese, and cobalt-containing hydroxides in the presence of aqueous ammonia. Synthetic optimization of Li O 2 via co-precipitation. New insight into Ni-rich layered structure for next-generation Li rechargeable batteries. Identifying and addressing critical challenges of high-voltage layered ternary oxide cathode materials. Systematic optimization of battery materials: Key parameter optimization for the scalable synthesis of uniform, high-energy, and high stability LiNi 0.6Mn 0.2Co 0.2O 2 cathode material for lithium-ion batteries. Enhanced surface chemical and structural stability of Ni-rich cathode materials by synchronous lithium-ion conductor coating for lithium-ion batteries. Graphene: A promising candidate for charge regulation in high-performance lithium-ion batteries. Co-free layered cathode materials for high energy density lithium-ion batteries. Mitigation of voltage decay in Li-rich layered oxides as cathode materials for lithium-ion batteries. Commercialization of lithium battery technologies for electric vehicles. Challenges for rechargeable Li batteries. This low-temperature strategy of synthesizing single-crystal LiNi 0.8Co 0.1Mn 0.1O 2 rods should be able to provide a feasible method for synthesizing other single-crystal Ni-rich cathode materials with excellent electrochemical performances for LIB.Īrmand, M. These superior electrochemical properties should be related to the monodispersed micron scaled morphology which not only decreases the contact area between electrode and electrolyte but also mitigates the formation of microcracks. The cycling stability at high cut-off voltage is also outstanding. When charge-discharged at 1 C for 100 cycles, discharge capacity of 178.1 mAh/g with the capacity retention of 95.1% are still obtained. When sintered at 750 ☌ with 50% Li-excess, the cathode material delivered an initial discharge capacity of 226.9 mAh/g with Coulombic efficiency of 91.2% at 0.1 C (1 C = 200 mA/g) in the voltage range of 2.8–4.3 V.
When used as the cathode material for LIBs, the as-prepared LiNi 0.8Co 0.1Mn 0.1O 2, with ordered layered-structure and low degree of cation mixing, shows excellent electrochemical performances. Compared with conventional synthesis methods, these LiNi 0.8Co 0.1Mn 0.1O 2 rods were calcined at a low temperature with excessive lithium sources, which not only reduces the sintering temperature but also ensures the mono-dispersed micrometer-scaled particle distribution. To deal with these issue, single-crystal pm-sized LiNi 0.8Co 0.1Mn 0.1O 2 rods was synthesized by a hydrothermal method. However, the anisotropic lattice volume changes linked to their α-NaFeO 2 structured crystal grains bring about poor cycle performances for conventionally produced NCM materials. With high reversible capacities of more than 200 mAh/g, Ni-rich layered oxides LiO 2 ( x ≥ 0.6) serve as the most promising cathode materials for lithium-ion batteries (LIBs).
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