Annealing effects of TiO2 coating on cycling performance of Ni-rich cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion battery

Zhao, Shunyu; Zhu, Yutao; Qian, Yucheng; Wang, Nengneng; Zhao, Meng; Yao, Jinlei; Xu, Yanhui

doi:10.1016/j.matlet.2020.127418

Cited by 43 publications

(26 citation statements)

References 18 publications

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“…In order to prevent side reactions between acidic HF and the electrode surface, many other air-resistant metal oxides have been used to protect the electrode from directly contacting organic electrolytes, such as Al 2 O 3 , TiO 2 , ZrO 2 , and SnO 2 . [70][71][72][73][74] However, whether or not these layers can provide protection against air has rarely been explored. Considering that H 2 O in air is the driving force of corrosion, using a hydrophobic material as the coating layer can be a reasonable choice.…”

Section: Fabrication Of a Protective Layer By Coatingmentioning

confidence: 99%

“… 54 The modified LiNi 0.8 Co 0.15 Al 0.05 O 2 displayed a much higher specific capacity retention than that of the pristine sample after storage for 40 days. In order to prevent side reactions between acidic HF and the electrode surface, many other air‐resistant metal oxides have been used to protect the electrode from directly contacting organic electrolytes, such as Al 2 O 3 , TiO 2 , ZrO 2 , and SnO 2 70–74 . However, whether or not these layers can provide protection against air has rarely been explored.…”

Section: Air Exposure Issues Facing Lib Electrode Materialsmentioning

confidence: 99%

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Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Zhang

Yang

et al. 2022

InfoMat

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With the development of electrode materials in lithium ion batteries-upgrading from LiCoO 2 and LiFePO 4 to Ni-rich layered oxides, and the shifting of battery systems from high cost lithium ion to low cost sodium ion technology, the air sensitivity of the electrode materials has become an increasingly important issue in both production and application. Furthermore, the air sensitivity of electrode materials must be carefully considered throughout nearly all stages of their life, including material design, synthesis, production, storage, packaging, transportation, and battery assembly. Therefore, a fundamental understanding of the air degradation mechanism of electrode materials and the exploration of new methods to enhance their air stability are of great significance for the development of batteries with better performance. Herein, we provide a review of the issues related to air exposure of electrode materials in Li/Na ion batteries, including factors related to air sensitivity, degradation mechanisms, and recent progress in improving their air stability. The merits and existing challenges of different strategies are presented, and a rational design perspective as well as general principles for evaluating air stability are proposed.

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Section: Fabrication Of a Protective Layer By Coatingmentioning

confidence: 99%

Section: Air Exposure Issues Facing Lib Electrode Materialsmentioning

confidence: 99%

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Zhang

Yang

et al. 2022

InfoMat

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“…However, TNCM500 has a slightly weaker peak, indicating that it corresponds to the mixture of the anatase and amorphous phases, as shown in Figure 1d. 34 The peak intensity ratios of I(003)/I(104), which indicates the degree of cation disorder, are listed in Table 1. The cation disorder is a sensitive parameter for determining the occupation of Ni 2+ with Li + at the 3a site owing to the ionic radius of Ni 2+ (0.69 Å) and Li + (0.76 Å).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The heat temperature can generally affect the crystal structure and microstructure of coating materials. 34 The coexistence of amorphous and anatase TiO 2 coating layer leads to enhanced rate performance due to the synergistic effect. 36 More importantly, we measured the rate performance of four TNCM500 samples to prove their reproducibility.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Suppressed Microcracking and F Penetration of Ni-Rich Layered Cathode via the Combined Effects of Titanium Dioxide Doping and Coating

Hwang

Sim

Jin

et al. 2021

ACS Appl. Energy Mater.

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To understand the effect of heat treatment of TiO 2 modification for Ni-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode, the TiO 2 coating layer is formed on the surface of LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode by heat treatment at 500 and 600 °C. The electrochemical results show that TiO 2 -modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 shows higher electrochemical performances compared to pristine sample. Among them, the TiO 2 -modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 heat-treated at 500 °C delivers not only the highest initial discharge capacity of 201.3 mAh g −1 but also the extraordinary rate capability (86.4% at 6.0C). Moreover, TiO 2 -modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 can effectively stabilize the cycling performance at 25 °C (79.4% after 100 cycles at 0.5C). Consequently, the TiO 2 -modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 by heat treatment at 500 °C can significantly improve the electrochemical performances due to facilitating Li-ion migration, working as a protective layer and inhibiting the irreversible phase transition. KEYWORDS: heat treatment, TiO 2 modification, Ni-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 , rate capability, cycling performance

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“…reactions with electrolyte at high potential. Up to now, various surface coating agents have been adopted to reduce the residual lithium impurities and to enhance the air storage stability of Ni-rich cathode materials, including phosphates (Jo et al, 2014a;Chen et al, 2017a;Min et al, 2018;Fan et al, 2019;Zou et al, 2020), fluoride (Dai et al, 2019;Huang et al, 2019b), conducting polymers (Sun et al, 2018;Gan et al, 2019;Yang et al, 2019b), and metallic oxides (Min et al, 2018;Zhao et al, 2018;Becker et al, 2019;Ho et al, 2020;Mo et al, 2020;Zhao et al, 2020). However, the formation mechanisms and functions of these coating layers are quite different, and need to be further investigated.…”

Section: Surface Coatingmentioning

confidence: 99%

The Formation, Detriment and Solution of Residual Lithium Compounds on Ni-Rich Layered Oxides in Lithium-Ion Batteries

Chen

Wang

et al. 2020

Front. Energy Res.

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Ni-rich layered transition-metal oxides with high specific capacity and energy density are regarded as one of the most promising cathode materials for next generation lithium-ion batteries. However, the notorious surface impurities and high air sensitivity of Ni-rich layered oxides remain great challenges for its large-scale application. In this respect, surface impurities are mainly derived from excessive Li addition to reduce the Li/Ni mixing degree and to compensate for the Li volatilization during sintering. Owing to the high sensitivity to moisture and CO2 in ambient air, the Ni-rich layered oxides are prone to form residual lithium compounds (e.g. LiOH and Li2CO3) on the surface, subsequently engendering the detrimental subsurface phase transformation. Consequently, Ni-rich layered oxides often have inferior storage and processing performance. More seriously, the residual lithium compounds increase the cell polarization, as well as aggravate battery swelling during long-term cycling. This review focuses on the origin and evolution of residual lithium compounds. Moreover, the negative effects of residual lithium compounds on storage performance, processing performance and electrochemical performance are discussed in detail. Finally, the feasible solutions and future prospects on how to reduce or even eliminate residual lithium compounds are proposed.

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Annealing effects of TiO2 coating on cycling performance of Ni-rich cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion battery

Cited by 43 publications

References 18 publications

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Suppressed Microcracking and F Penetration of Ni-Rich Layered Cathode via the Combined Effects of Titanium Dioxide Doping and Coating

The Formation, Detriment and Solution of Residual Lithium Compounds on Ni-Rich Layered Oxides in Lithium-Ion Batteries

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