Construction of homogeneously Al3+ doped Ni rich Ni-Co-Mn cathode with high stable cycling performance and storage stability via scalable continuous precipitation

Li, Yongchun; Xiang, Wei; Wu, Zhenguo; Xu, Chunliu; Xu, Ya-Di; Xiao, Yao; Yang, Zuguang; Wu, Chunjin; Lv, Genpin; Guo, Xiaodong

doi:10.1016/j.electacta.2018.08.124

Cited by 178 publications

(92 citation statements)

References 40 publications

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“…For example, trivalent Ni ions in Ni-rich materials spontaneously reduce to divalent Ni ions and produce reactive oxygen ions, which readily react with water and carbon dioxide in air to form lithium residue, such as lithium carbonate and lithium hydroxide. [14,[18][19][20] HF produced by lithium hydroxide corrodes the electrode material, resulting in an irreversible phase change of the cathode. [21][22][23] Moreover, the dissolution of metal ions is accelerated at high temperatures, causing the layered structure to collapse and the material's thermal stability to deteriorate.…”

Section: Introductionmentioning

confidence: 99%

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Huang

Peng

et al. 2019

ChemElectroChem

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Layered nickel (Ni)-rich materials have been widely studied as attractive cathode materials for lithium-ion batteries, owing to their high theoretical specific capacity and low cost; however, most Ni-rich materials have poor cycle performance, especially at high temperatures. This study reports a simple sol-gel method for developing lithium fluoride (LiF)-coated Li-Ni 0.90 Co 0.08 Al 0.02 O 2 (NCA@LiF) by immersing NCA powder in a 1butyl-2,3-dimethylimidazolium tetrafluoroborate (BdmimBF 4 ) solution. The residual Li compound on the surface of NCA can be converted into a uniform LiF coating layer through the in situ hydrolysis of BdmimBF 4 . The Li-conducting LiF coating layer inhibits side reactions (LiPF 6 !PF 5 + LiF, PF 5 + H 2 O!POF 3 + HF, POF 3 + Li 2 O!Li x POF y + LiF, Li 2 O/LiOH + HF!H 2 O + 2LiF) with the electrolyte and protects the electrode from HF corrosion. The NCA@LiF sample shows a high capacity retention rate of 79.9 % after 200 cycles at 1 C and an excellent capacity of 155.7 mAh g À 1 at 10 C at room temperature. Additionally, the capacity retention rate of the NCA@LiF sample at high temperatures exhibited a significant improvement in comparison with the NCA sample, reaching 75.7 % after 100 cycles at 60°C at 1 C. This simple and effective method can be used for improving the electrochemistry stability and high-temperature performance of other Ni-based cathode materials.

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Section: Introductionmentioning

confidence: 99%

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Huang

Peng

et al. 2019

ChemElectroChem

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“…F ast charging, lightweight and stable storage techniques can complement the green energy generation sources such as wind or solar to provide efficient and completely renewable energy systems. Scientists have been incessantly working on developing various lithium-based compounds such as high nickel NCM811 and NCA to meet the needs [1][2][3][4][5][6][7][8][9] . However, from their intrinsic layered-type structure, these compounds have limited specific capacity by the number of lithium ions that can participate in redox reactions.…”

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confidence: 99%

Voltage fade mitigation in the cationic dominant lithium-rich NCM cathode

Chandan

Chang²,

Yeh³

et al. 2019

Commun Chem

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In the archetypal lithium-rich cathode compound Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 , a major part of the capacity is contributed from the anionic (O 2−/− ) reversible redox couple and is accompanied by the transition metal ions migration with a detrimental voltage fade. A better understanding of these mutual interactions demands for a new model that helps to unfold the occurrences of voltage fade in lithium-rich system. Here we present an alternative approach, a cationic reaction dominated lithium-rich material Li 1.083 Ni 0.333 Co 0.083 Mn 0.5 O 2 , with reduced lithium content to modify the initial band structure, hence~80% and~20% of capacity are contributed by cationic and anionic redox couples, individually. A 400 cycle test with 85% capacity retention depicts the capacity loss mainly arises from the metal ions dissolution. The voltage fade usually from Mn 4+ /Mn 3+ and/or O n− /O 2− reduction at around 2.5/3.0 V seen in the typical lithium-rich materials is completely eliminated in the cationic dominated cathode material.

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“…S2 † presents Co 2p 1/2 main peak at about 795 eV and Co 2p 3/2 main peak at about 780 eV, verifying the oxidation state of 4 + . [40][41][42][43][44] At 0.1C, the primary charge/discharge curves of NCM, NCM/ C and NCM/CB are shown in Fig. 5a.…”

Section: Resultsmentioning

confidence: 99%

Structure and electrochemical performance modulation of a LiNi_0.8Co_0.1Mn_0.1O₂ cathode material by anion and cation co-doping for lithium ion batteries

Ming

Xiang

et al. 2019

RSC Adv.

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Construction of homogeneously Al3+ doped Ni rich Ni-Co-Mn cathode with high stable cycling performance and storage stability via scalable continuous precipitation

Cited by 178 publications

References 40 publications

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Voltage fade mitigation in the cationic dominant lithium-rich NCM cathode

Structure and electrochemical performance modulation of a LiNi_0.8Co_0.1Mn_0.1O₂ cathode material by anion and cation co-doping for lithium ion batteries

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Construction of homogeneously Al3+ doped Ni rich Ni-Co-Mn cathode with high stable cycling performance and storage stability via scalable continuous precipitation

Cited by 178 publications

References 40 publications

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Enhanced High‐Temperature Electrochemical Performance of Layered Nickel‐Rich Cathodes for Lithium‐Ion Batteries after LiF Surface Modification

Voltage fade mitigation in the cationic dominant lithium-rich NCM cathode

Structure and electrochemical performance modulation of a LiNi0.8Co0.1Mn0.1O2 cathode material by anion and cation co-doping for lithium ion batteries

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Structure and electrochemical performance modulation of a LiNi_0.8Co_0.1Mn_0.1O₂ cathode material by anion and cation co-doping for lithium ion batteries