Improved cycle stability of high-capacity Ni-rich LiNi0.8Mn0.1Co0.1O2 at high cut-off voltage by Li2SiO3 coating

Zhao, Enyue; Chen, Minmin; Hu, Zhongbo; Chen, Dongfeng; Yang, Limei; Xiao, Xiaoling

doi:10.1016/j.jpowsour.2017.01.066

Cited by 131 publications

(56 citation statements)

References 37 publications

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“…The valence states of Li, Mn and Co are +1, +3 and +4, respectively, in both the pristine and Na‐doped samples, as determined by comparing the measured and theoretical data for these elements. These results are consistent with previous results reported in the literature ,. From the XPS analysis, it can be concluded that the valences of Ni, Mn and Co in the pristine and Na‐doped materials are the same, suggesting that Na doping into the Li + sites does not affect the oxidation states of Ni, Mn and Co in LiNi 0.8 Co 0.1 Mn 0.1 O 2 materials.…”

Section: Resultssupporting

confidence: 92%

“…The capacity retention of the Li 2 SiO 3 ‐coated electrodes and LiNi 0.8 Co 0.1 Mn 0.1 O 2 is 77.6 and 57.6 %, respectively, at the voltage of 4.6 V after 50 cycles. The Li + ‐conductive Li 2 SiO 3 coating layer can alleviate side reactions on the interface of electrode‐electrolyte effectively . At the same time, the issues of voltage reduction and polarization of pristine material are also remitted.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

Jia

Shangguan

et al. 2018

Energy Tech

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Ni-rich cathode materials have high capacities but exhibit serious capacity attenuation. Therefore, a strategy for modifying a LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode material by Na doping of the Li + sites is proposed to improve its electrochemical performance. In this work, Li 1À x Na x Ni 0.8 Co 0.1 Mn 0.1 O 2 (x = 0, 0.01, 0.03) materials are synthesized by a co-precipitation and solid-state sintering method, and their structures and electrochemical properties are analyzed. X-ray diffraction (XRD) results suggest that all the prepared materials have a typical hexagonal layered structure with no impurities. The spacing of the Li layers increases from 2.59251 Å to 2.59805 Å, which shows that a small amount of larger Na ions (0.102 nm) occupy the Li sites (0.076 nm). Additionally, electrochemical measurements show that the high-rate performance and cycling stability are significantly improved when some of the Li + sites in LiNi 0.8 Co 0.1 Mn 0.1 O 2 are occupied by Na + . Specifically, the capacity retention of Li 0.99 Na 0.01 Ni 0.8 Co 0.1 Mn 0.1 O 2 is 91 % after 100 cycles at a rate of 10 C. Meanwhile, the mechanism about electrochemical performance was improved by doping Na + into Li + sites of LiNi 0.8 Co 0.1 Mn 0.1 O 2 has been further discussed.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

Jia

Shangguan

et al. 2018

Energy Tech

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“…Several efforts have been done to improve the cycling stability of LIBs with high working voltage, such as doping other metal atoms into the cathode framework, coating covering layer on the surface of cathode and effective electrolyte additives . However, the reason of the poor cycle behavior at high cut‐off potential caused by accelerated degradation is still unclear …”

Section: Introductionsupporting

confidence: 92%

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

et al. 2018

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The further development of lithium-ion batteries is often desired to obtain higher capacities by charging to higher potentials. However, such a high potential (> 4.3 V) will inevitably result in capacity loss of the LiMn 2 O 4 cathode material over numerous cycles. In this work, degradation mechanisms of LiMn 2 O 4 electrode cycled at different charge cut-off potentials (4.4, 4.5, 4.6, 4.7, and 4.8 V vs. Li/Li + , respectively) have been investigated. It is found that the capacity degraded seriously after aging cycles at the cut-off potentials (< 4.6 V), especially at 4.4 V. Remarkably, a thicker cathode-electrolyte interface (CEI) film on the cathode surface can be observed when the potential reached 4.7 and 4.8 V. Thus, two degradation mechanisms are proposed, which are also verified by the calculation of the diffusion coefficient of Li + ions (D Li + ). This work demonstrates the relationship between the capacity fade and cut-off potentials and provides a useful guidance for other cathode materials with high-voltage operation.

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“…As mentioned before, the coating materials used in Ni‐rich materials include inorganics, organics, and some composite coating materials. For inorganics, the coating materials in recent works mainly include metal oxides (ZnO, [ 33 ] TiO 2 , [ 33‐37 ] Al 2 O 3 , [ 30,33,38‐42 ] ZrO 2 , [ 38,43‐46 ] Nb 2 O 3 , [ 47 ] Co 3 O 4 , [ 33,48 ] Cr 8 O 21 , [ 49 ] MgO, [ 38 ] MnO 2 , [ 50,51 ] V 2 O 3 , [ 33 ] and V 2 O 5 [ 52 ] ), metal fluorides (LiF, [ 53‐55 ] AlF 3 , [ 54,56 ] and FeF 3 [ 57 ] ), metal phosphates (LaPO 4 , [ 58‐60 ] FePO 4 , [ 61‐63 ] CoPO 4 , [ 62,63 ] AlPO 4 , [ 40,62,64‐65 ] and MnPO 4 [ 63,66 ] ), and some kinds of lithium compounds (LiBO 2 , [ 67 ] LiAlO 2 , [ 40,41,68‐71 ] Li 2 MoO 4 , [ 72 ] Li 2 ZrO 3 , [ 43,73‐74 ] Li 3 VO 4 , [ 75‐76 ] Li 3 PO 4 , [ 77‐78 ] Li 2 SiO 3 , [ 79‐81 ] Li 4 SiO 4 , [ 82 ] Li x Ti 2 O 4 , [ 70 ] Li 4 Ti 5 O 12 , [ 83‐84 ] LiZr 2 (PO 4 ) 3 , [ 85 ] and LiAlF 4 [ 54 ] ) and carbon materials (traditional carbon materials, [ 86‐88 ] modified carbon materials, [ 89‐90 ] carbon nanotube materials, […”

Section: Applications Of Coating In Ni‐rich Materialsmentioning

confidence: 99%

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†

Chen

Lai

et al. 2020

Chin. J. Chem.

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Although layered Ni-rich cathode materials have attracted lots of attention for their high capacity and power density, several significant issues, such as poor thermal stability and moderate cyclability, limit their practical applications. Most of these undesired problems of Ni-rich materials are caused by the unstable surface or the parasitic reactions at cathode-electrolyte interface. Surface coating is the most common method to suppress such interfacial problems for Ni-rich materials. This review focuses on the surface engineering of the Ni-rich materials in recent years, including the species used in coating, synthetic strategies of uniform coating layer, and the positive effects of coating species on the active materials. Detailed discussions are also taken to describe the formation mechanism of the surface coating layer with design philosophy. Finally, the prospects for further developments and challenges in surface coating are also summarized. Yuefeng Su (left) is a professor in the School of Materials Science and Engineering at Beijing Institute of Technology (BIT). In 2013, he was awarded New Century Excellent Talents in University from the Chinese Ministry of Education. His research group mainly engaged in the research of green secondary batteries and advanced energy materials, including lithium-rich cathode materials, nickel-rich cathode materials and other high-power energy storage devices. As the principal investigator, Prof. Su successfully hosted the National Key Research and National Natural Science Foundation of China, etc. Gang Chen (middle) is currently a Ph.D. candidate under the supervision of Prof. Yuefeng Su in the School of Materials Science and Engineering at Beijing Institute of Technology. His major research includes the design and synthesis of Ni-rich cathode materials for high performance lithium ion batteries, especially for the interfacial design and its mechanism research of Ni-rich materials. Lai Chen (right) obtained his Ph.D. majoring in Environmental Engineering from Beijing Institute of Technology (BIT) in 2017, and is currently an associate professor at the school of Materials Science and Engineering at BIT. As the principal investigator, he has successfully hosted the

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Improved cycle stability of high-capacity Ni-rich LiNi0.8Mn0.1Co0.1O2 at high cut-off voltage by Li2SiO3 coating

Cited by 131 publications

References 37 publications

Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†

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Improved cycle stability of high-capacity Ni-rich LiNi0.8Mn0.1Co0.1O2 at high cut-off voltage by Li2SiO3 coating

Cited by 131 publications

References 37 publications

Improving the Electrochemical Performance of Ni‐Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing

Improving the Electrochemical Performance of Ni‐Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing

New Insights for the Abuse Tolerance Behavior of LiMn2O4 under High Cut‐Off Potential Conditions

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries†

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Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

Improving the Electrochemical Performance of Ni‐Rich LiNi_0.8Co_0.1Mn_0.1O₂ by Enlarging the Li Layer Spacing

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†