Alleviating the air sensitivity of nickel-rich LiNi0.815Co0.15Al0.035O2 cathode by Zr4+-modification for Li-ion batteries

Lai, Yanqing; Wu, Jian; Tang, Yiwei; Shang, Guozhi; Xing, Yang; Fan, Hailin; Peng, Can; Zhang, Zhian

doi:10.1016/j.ceramint.2019.04.136

Cited by 33 publications

(23 citation statements)

References 36 publications

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“…Nevertheless, the air sensitivity of the doped materials is usually reduced but not eliminated, which means that degradation can still occur when the doped materials are exposed to air. 53,60 The most favorable situation is that a protective layer forms on the surface, usually with a spinel or tunnel structure, while a layered structure is maintained in the core. Moreover, the construction of a hybrid structure through doping is an effective method.…”

Section: Remaining Challengesmentioning

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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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: Remaining Challengesmentioning

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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“…Owing to the highly reactive Ni 3+ ions that are effectively reduced, the air-storage stability of NCM811 is improved. Similarly, Lai et al demonstrated that the air-storage stability of LiNi 0.815 Co 0.15 Al 0.035 O 2 can be significantly improved after 1% nano-ZrO 2 doping ( Figure 6F) (Lai et al, 2019).…”

Section: Dopingmentioning

confidence: 66%

“…(F) Cycling performances of both bare and Zr 4+ modified NCA before and after air exposure, indicating enhanced cycling stability and air stability of Zr doped NCA. Adapted from [Lai et al, 2019] with permission from Elsevier. (G) Cycling performance comparison of LiNi 0.94 Co 0.06 O 2 before and after B 2 O 3 doping in pouch full cell with graphite anode cycled between 2.5 and 4.3 V at 25°C and (H) Cycling performance comparison of the 30-day stored LiNi 0.94 Co 0.06 O 2 before and after B 2 O 3 doping in half cell and (I) Residual lithium content changes of the fresh and 30-day air-stored B 2 O 3 doped LiNi 0.94 Co 0.06 O 2 and (J) TOF-SIMS three dimension depth profiling of Bo x − (x 1 or 2) species in the fresh B 2 O 3 doped particle.…”

Section: Surface Coatingmentioning

confidence: 99%

“…The enhanced surface lattice stability is mainly attributed to the robust Al-O bond ( Figure 6C). Moreover, some high valent cations are doped to reduce the content of surface active Ni 3+ (being reduced to stable Ni 2+ to keep charge balance) (Han et al, 2018;Lai et al, 2019). As displayed in Figure 6D, E cation-mixed nanolayer with ∼5 nm thickness forms on the surface of NCM811 after doping Zr 4+ , in which Zr 4+ ions occupy the transition metal site and increase the amount of Ni 2+ to maintain the charge balance (Han et al, 2018).…”

Section: Dopingmentioning

confidence: 99%

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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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“…The electrochemical results showed that after ten days of exposure, the NCA modified by Zr 4+ maintained 96.9% of the initial discharge capacity, while that of the unmodified sample is only 73.2%. [ 80 ]…”

Section: Methods To Eliminate Residual Lithium Compoundsmentioning

confidence: 99%

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

Chen

et al. 2020

Chin. J. Chem.

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Ni-rich cathode materials have become one of the most promising cathode materials for advanced high-energy Li-ion batteries (LIBs) owing to their high specific capacity. However, Ni-rich cathode materials are sensitive to the trace H2O and CO2 in the air, and tend to react with them to generate LiOH and Li2CO3 at the particle surface region (named residual lithium compounds, labeled as RLCs). The RLCs will deteriorate the comprehensive performances of Ni-rich cathode materials and make trouble in the subsequent manufacturing process of electrode, including causing low initial coulombic efficiency and poor storage property, bringing about potential safety hazards, and gelatinizing the electrode slurry. Therefore, it is of considerable significance to remove the RLCs. Researchers have done a lot of work on the corresponding field, such as exploring the formation mechanism and elimination methods. This paper investigates the origin of the surface residual lithium compounds on Ni-rich cathode materials, analyzes their adverse effects on the performance and the subsequent electrode production process, and summarizes various kinds of feasible methods for removing the RLCs. Finally, we propose a new research direction of eliminating the lithium residuals after comparing and summing up the above. We hope this work can provide a reference for alleviating the adverse effects of residual lithium compounds for Ni-rich cathode materials' industrial production. Yuefeng Su (left) is a professor in 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 green secondary batteries and advanced energy materials, including lithium-rich cathode materials, nickel-rich cathode materials, and other high-power energy storage devices. Linwei Li (middle) is currently a graduate student under the supervision of Prof. Yuefeng Su in School of Materials Science and Engineering at Beijing Institute of Technology. Her research focuses on the synthesis and performance improvement of Ni-rich cathode materials for lithium-ion batteries. Gang Chen (right) is currently a Ph.D. candidate under the supervision of Prof. Yuefeng Su in 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.

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Alleviating the air sensitivity of nickel-rich LiNi0.815Co0.15Al0.035O2 cathode by Zr4+-modification for Li-ion batteries

Cited by 33 publications

References 36 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

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

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

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Alleviating the air sensitivity of nickel-rich LiNi0.815Co0.15Al0.035O2 cathode by Zr4+-modification for Li-ion batteries

Cited by 33 publications

References 36 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

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

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials†

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Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†