Li4V2Mn(PO4)4-stablized Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials for lithium ion batteries

Yang, Sheng; Wang, Pengbo; Wei, Han‐xin; Tang, Lin‐bo; Zhang, Xiahui; He, Zhenjiang; Li, Yunjiao; Tong, Hui; Zheng, Junchao

doi:10.1016/j.nanoen.2019.103889

Cited by 145 publications

(59 citation statements)

References 51 publications

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“…Moreover, the LCO displays a 3D channel structure as shown through the crystal structure model in Figure S2, Supporting Information, which means that it may be a good Li + conductor, and the 3D channel could enhance the Li + diffusion and crystal structure stability. [21] Furthermore, it should be emphasized that the existence of the LCO layer could work as a protect layer to alleviate the cauterization of electrolyte, thereby enhancing the stability of electrode/electrolyte interface.…”

Section: The Structure Evolution Of Lco Modified Lmomentioning

confidence: 99%

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Chen

Zou

Deng

et al. 2020

Adv Funct Materials

161

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The practical application of Li-rich Mn-based oxide cathode is predominately retarded by the capacity decline and voltage fading, associated with the structure distortion and anionic redox reactions. Here, a linkagefunctionalized modification approach to tackle these challenges via a synchronous lithium oxidation strategy is reported. The doping of Ce in the bulk phase activates the pseudo-bonding effect, effectively stabilizing the lattice oxygen evolution and suppressing the structure distortion. Interestingly, it also induces the formation of spinel phase Li 4 Mn 5 O 12 in the subsurface, which in turn constructs the phase boundaries, thereby arousing the interior self-built-in electric field to prevent the outward migration of bulk oxygen anions and boost the charge transfer. Moreover, the formed coating layer Li 2 CeO 3 with oxygen vacancies accelerates Li + diffusion and mitigates electrolyte cauterization. The corresponding cathode exhibits superior longcycle stability after 300 cycles with only a 0.013% capacity drop and 1.76 mV voltage decay per cycle. This work sheds new light on the development of Li-rich Mn-based oxide cathodes toward high energy density applications.

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Section: The Structure Evolution Of Lco Modified Lmomentioning

confidence: 99%

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Chen

Zou

Deng

et al. 2020

Adv Funct Materials

161

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“…In order to evaluate the electrochemical property of the samples LL-111, LL-523 and LL-811, the first charge-discharge curves, rate performances from 0.1C to 5C and cycling performances at 1C (1C=200 mAh•g -1 ) between 2 V to 4.8 V are shown in Figure 5. As shown in Fig 5a, there are two distinct voltage plateaus during the first charge process: (1) a smooth voltage plateau below 4.5 V and (2) a long voltage plateau about 4.5 V [42]. The first discharge capacities of LL-111, LL-523, LL-811 are 284.6 mAh•g -1 , 263.0 mAh•g -1 , 207.4 mAh•g -1 , respectively.…”

Section: Electrochemical Charge/discharge Behaviormentioning

confidence: 95%

Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-ion Batteries

Liu¹,

Liu²,

Zhu³

et al. 2019

Preprint

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Li-rich layered oxide cathode materials have become one of the most promising cathode materials for high-energy-density lithium-ion batteries owning to its high theoretical specific capacity, low cost, high operating voltage and environmental friendliness. Yet they suffer from severe capacity and voltage attenuation during prolong cycling, which blocks their commercial application. To clarify these causes, we synthesize 0.5Li2MnO3·0.5LiNi0.8Co0.1Mn0.1O2 (LL-811) with high-nickel-content cathode material by a solid-sate complexation method, and it manifests a lot slower capacity and voltage attenuation during prolong cycling compared to LL-111 and LL-523 cathode materials. The capacity retention at 1C after 100 cycles reaches to 87.5% and the voltage attenuation after 100 cycles is only 0.460 V. Combining X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM), it indicates that increasing the nickel content not only stabilizes the structure but also alleviates the attenuation of capacity and voltage. Therefore, it provides a new idea for designing of Li-rich layered oxide cathode materials that suppress voltage and capacity attenuation.

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“…Generally, ions doping was employed to improve the electrochemical stability of cathode materials, and surface coating was employed to inhibit the degradation of cathode materials For example, the oxides such as MgO, LiAlO 2 , and FePO 4 were used as surface coating materials to improve the structural stability, through preventing the corrosion of electrolytes. Additionally, the smaller size of cathode active particles were considered to make Li + ions rapid insertion and extraction within them, by which the stability and rate performance of the materials were enhanced. Besides, ions doping has been always employed to inhibit the phase transformation and stabilize the crystal structure of the cathode materials .…”

Section: Introductionmentioning

confidence: 98%

Electrochemical Performance of Iron‐doped Li_1.2Mn_0.6Ni_0.2O₂ Cathode Materials Prepared by Combustion Synthesis

Zhang

et al. 2019

ChemistrySelect

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Li‐rich manganese cathode materials have increasingly attracted much attention because of their high specific capacities applied in Li‐ion batteries. However, they have suffered from low coulombic efficiency and poor rate capability. In this study, we utilize Fe ion doping and control grain morphology to improve the electrochemical performance of Li1.2Mn0.6Ni0.2O2. Fe‐doped Li1.2Mn0.6Ni0.2O2 powders were successfully prepared via combustion synthesis, with equiaxed appearance and submicron size. The electrochemical measurement demonstrated that through Fe doping, a high discharging capacity of 192.0 mAh⋅g−1 was achieved for the sample at the rate of 1 C, and the cyclic stability and rate capacity were significantly enhanced compared. Further investigations illustrated that Fe ions manifested electrochemical activity during lithiation and delithiation, and enabled to stabilize hexagonal structure of the sample and enlarge the crystal interlayer spacing. It is the synergistic effect that endows the doped sample more specific capacity and high cyclic and rate performance.

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Li4V2Mn(PO4)4-stablized Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials for lithium ion batteries

Cited by 145 publications

References 51 publications

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-ion Batteries

Electrochemical Performance of Iron‐doped Li_1.2Mn_0.6Ni_0.2O₂ Cathode Materials Prepared by Combustion Synthesis

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Li4V2Mn(PO4)4-stablized Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials for lithium ion batteries

Cited by 145 publications

References 51 publications

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Pseudo‐Bonding and Electric‐Field Harmony for Li‐Rich Mn‐Based Oxide Cathode

Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-ion Batteries

Electrochemical Performance of Iron‐doped Li1.2Mn0.6Ni0.2O2 Cathode Materials Prepared by Combustion Synthesis

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Product

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Electrochemical Performance of Iron‐doped Li_1.2Mn_0.6Ni_0.2O₂ Cathode Materials Prepared by Combustion Synthesis