A Novel Ni-rich O3-Na[Ni0.60Fe0.25Mn0.15]O2 Cathode for Na-ion Batteries

Ding, Feixiang; Zhao, Chenglong; Zhou, Dong; Meng, Qinghan; Xiao, Dongdong; Zhang, Qiangqiang; Niu, Yaoshen; Li, Yuqi; Rong, Xiaohui; Lu, Yaxiang; Chen, Liquan; Hu, Yong‐Sheng

doi:10.1016/j.ensm.2020.05.013

Cited by 109 publications

(81 citation statements)

References 42 publications

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“…The two intense peaks for the Co, Mn, and Ni K‐edges are corresponding to the average TM‐O length of the first shell TM‐O 6 and TM‐TM length of the TM‐TM 6 shell on the ab plane, respectively. [ 30 ] CoO and MnO bond show negligible change after modification of NCM. In the Ni K‐edge EXAFS spectra, compared to the NCM‐0, the peak intensity of the second shell for NCM‐2 slightly decreases with the formation of amorphous phosphate.…”

Section: Resultsmentioning

confidence: 99%

Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Liu

Hao

et al. 2021

Adv Funct Materials

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The fast capacity/voltage fading with a low rate capability has challenged the commercialization of layer‐structured Ni‐rich cathodes in lithium‐ion batteries. In this study, an ultrathin and stable interface of LiNi0.8Mn0.1Co0.1O2 (NCM) is designed via a passivation strategy, dramatically enhancing the capacity retention and operating voltage stability of cathode at a high cut‐off voltage of 4.5 V. The rebuilt interface as a stable path for Li+ transport, would strengthen the cathode–electrolyte interface stability, and restrain the detrimental factors for cathode–electrolyte interfacial reactions, intergranular cracking and irreversible phase transformation from layered to spinel, even salt‐rock phase. The as‐optimized NCM displays a higher cyclability (i.e., 206.6 mA h g−1 at 0.25 C (50 mA g−1) with 92.0% capacity retention over 100 cycles) and a better rate capability (141.0 and 112.6 mA h g−1 at 12.5 and 25 C, respectively) than pristine NCM (205.0 mA h g−1 with 73.0% capacity retention at 0.25 C; 120.9 and 93.1 mA h g−1 at 12.5 and 25 C, respectively).

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Section: Resultsmentioning

confidence: 99%

Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Liu

Hao

et al. 2021

Adv Funct Materials

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“…21 In particular, the large volume changes and thermodynamic instability of the high voltage O3 00 phase has been associated with inferior cycling and rate performance for the Ni-rich O3-Na [Ni x Fe y Mn 1ÀxÀy ]O 2 (x ¼ 0.6, 0.7 and 0.8) series. 54 2.1.3 P3-type. P3-type materials are typically formed by the extraction of sodium ions from O3-type positive electrodes upon charging.…”

Section: Phase Transitions At the Charged Statementioning

confidence: 99%

Probing the charged state of layered positive electrodes in sodium-ion batteries: reaction pathways, stability and opportunities

2020

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“…It is worth noting that during the process of electrochemical ion exchange, the overall

D_{{Li}^{+}}

value is comparative with the general layered LIBs and SIBs cathode materials. [ 52,60 ] This demonstrates that electrochemical ion exchange can maintain the integrity of the crystal structure and a good alkali ion diffusion channel in the host material.…”

Section: Resultsmentioning

confidence: 96%

Highly Reversible Anion Redox of Manganese‐Based Cathode Material Realized by Electrochemical Ion Exchange for Lithium‐Ion Batteries

Yang

Zhong

Feng

et al. 2021

Adv Funct Materials

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Anion energy storage provides the possibility to achieve higher specific capacity in lithium‐ion battery cathode materials, but the problems of capacity attenuation, voltage degradation, and inconsistent redox behavior are still inevitable. In this paper, a novel O2‐type manganese‐based layered cathode material Lix[Li0.2Mn0.8]O2 with a ribbon superlattice structure is prepared by electrochemical ion exchange, which realizes the highly reversible redox of anions and excellent cycle performance. Through low‐voltage pre‐cycling treatment, the specific capacity of the material can reach 230 mAh g−1 without obvious voltage attenuation. During the electrochemical ion exchange, the precursor with P2 structure transforms into Lix[Li0.2Mn0.8]O2 with O2 structure through the slippage and shrink of adjacent slabs, and the special superlattice structure in Mn slab is still retained. Simultaneously, a certain degree of lattice mismatch and reversible distortion of the MnO6 octahedron occur. In addition, the anion redox catalyzes the formation of the solid electrolyte interface, stabilizing the electrode/electrolyte interface and inhibiting the dissolution of Mn. The mechanism of electrochemical ion exchange is systematically studied by comprehensive structural and electrochemical characterization, opening an attractive path for the realization of highly reversible anion redox.

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A Novel Ni-rich O3-Na[Ni0.60Fe0.25Mn0.15]O2 Cathode for Na-ion Batteries

Cited by 109 publications

References 42 publications

Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Probing the charged state of layered positive electrodes in sodium-ion batteries: reaction pathways, stability and opportunities

Highly Reversible Anion Redox of Manganese‐Based Cathode Material Realized by Electrochemical Ion Exchange for Lithium‐Ion Batteries

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A Novel Ni-rich O3-Na[Ni0.60Fe0.25Mn0.15]O2 Cathode for Na-ion Batteries

Cited by 109 publications

References 42 publications

Functional Passivation Interface of LiNi0.8Co0.1Mn0.1O2 toward Superior Lithium Storage

Functional Passivation Interface of LiNi0.8Co0.1Mn0.1O2 toward Superior Lithium Storage

Probing the charged state of layered positive electrodes in sodium-ion batteries: reaction pathways, stability and opportunities

Highly Reversible Anion Redox of Manganese‐Based Cathode Material Realized by Electrochemical Ion Exchange for Lithium‐Ion Batteries

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Product

Resources

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Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage

Functional Passivation Interface of LiNi_0.8Co_0.1Mn_0.1O₂ toward Superior Lithium Storage