MnO2 nanowires as precursor synthesis of lithium-rich cathode material with enhanced electrochemical performances
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Lithium-rich cathode material Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion battery has been successfully synthesized through combination of co-precipitation and α-MnO2 nanowires as precursor. The X-ray diffraction (XRD) results reveal that the as-obtained material can exhibit well-layered structure and crystallization. The as-prepared sample has been investigated by the scanning electron microscope (SEM) and transmission electron microscopy (TEM). The possible reason for the formation of polyhedron has been presented. The results of electrochemical performance reveal that the as-prepared sample with combination of two methods can provide an initial discharge specific capacity of 247.5 mAh g−1 at 0.2 C within a potential range of 2.0–4.8 V, and this material can also deliver a discharge specific capacity of 181.8 mAh g−1 at 2 C with 97.8% capacity retention after 100 cycles. Hence, it is proposed that combination of two methods might be a promising strategy to prepare electrode cathode materials with improved performance.
KeywordsBatteries Electrochemical promotion
This work was financially supported by the Shanghai Science and Technology Committee (Grant number 16020500800), Shanghai Natural Science Fund (Grant number 15ZR1418100), and Natural Science Foundation of China (51402187).
- 2.Nayak PK, Erickson EM, Schipper F, Penki TR, Munichandraiah N, Adelhelm P, Sclar H, Amalraj F, Markovsky B, Aurbach D (2018) Review on challenges and recent advances in the electrochemical performance of high capacity Li- and Mn-rich cathode materials for Li-ion batteries. Adv Energy Mater 8(8):1702397–1702412CrossRefGoogle Scholar
- 3.Martha SK, Sclar H, Szmuk Framowitz Z, Kovacheva D, Saliyski N, Gofer Y, Sharon P, Golik E, Markovsky B, Aurbach D (2009) A comparative study of electrodes comprising nanometric and submicron particles of LiNi0.50Mn0.50O2, LiNi0.33Mn0.33Co0.33O2, and LiNi0.40Mn0.40Co0.20O2 layered compounds. J Power Sources 189(1):248–255CrossRefGoogle Scholar
- 4.Oishi M, Yamanaka K, Watanabe I, Shimoda K, Matsunaga T, Arai H, Ukyo Y, Uchimoto Y, Ogumi Z, Ohta T (2016) Direct observation of reversible oxygen anion redox reaction in li-rich manganese oxide, Li2MnO3, studied by soft X-ray absorption spectroscopy. J Mater Chem A 4(23):9293–9302CrossRefGoogle Scholar
- 5.Zhang S, Gu H, Tang T, du W, Gao M, Liu Y, Jian D, Pan H (2017) In situ encapsulation of the nanoscale Er2O3 phase to drastically suppress voltage fading and capacity degradation of a Li- and Mn-rich layered oxide cathode for lithium ion batteries. ACS Appl Mater Interfaces 9(39):33863–33875CrossRefGoogle Scholar
- 22.Deng YP, Yin ZW, Wu ZG, Zhang SJ, Fu F, Zhang T, Li JT, Huang L, Sun SG (2017) Layered/spinel heterostructured and hierarchical micro/nanostructured Li-rich cathode materials with enhanced electrochemical properties for Li-ion batteries. ACS Appl Mater Interfaces 9(25):21065–21070CrossRefGoogle Scholar