Improvement of electrochemical performance of nickel rich LiNi0.6Co0.2Mn0.2O2cathode active material by ultrathin TiO2coating

Qin, Cancan; Cao, Jiali; Chen, Jun; Dai, Gaole; Wu, Taotao; Chen, Yanbin; Tang, Yuefeng; Li, Ai‐Dong; Chen, Yanfeng

doi:10.1039/c6dt01764a

Cited by 101 publications

(48 citation statements)

References 32 publications

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“…16 Qin et al found that ultrathin TiO 2 can be coated on the Ni-rich cathode material to protect the active material from HF attack, which withstand the dissolution of metal ions in the electrode and favour the lithium diffusion of oxide. 17 The modication by a small amount of other cations such as Mg/Al 18 , Ga 19 , and FePO 4 (ref. 20) etc.…”

Section: Introductionmentioning

confidence: 99%

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites

2017

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Section: Introductionmentioning

confidence: 99%

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites

2017

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“…Representative approaches include the doping, [86][87][88][89][90][91][92][93][94][95][96][97][98] morphological control of the primary particle, [99][100][101][102][103][104] the cathode surface modification, [105][106][107][108][109][110] and the primary particle coating, [35,37,[111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126] which will be discussed below.…”

Section: Strategies To Realize Commercializationmentioning

confidence: 99%

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

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practical candidate for the wide application of the LIBs with respect to the reversible capacity, rate capability, and capital cost. [4][5][6][7] In terms of nickel contents, the nickel-rich cathodes with nickel content above 80% have advantages in gravimetric capacity, allowing high gravimetric energy density, compared with the nickel content less than 80%. Currently, the nickel-rich cathodes with the amount of nickel less than 60% are fully commercialized. However, the nickel-rich cathodes with nickel content of ≥80% still have many difficulties in the commercialization with respect to powder properties and electrode fabrication process.The unstable powder properties originate from residual lithium compounds such as LiOH and Li 2 CO 3 that formed by the spontaneous reduction of sensitive trivalent nickel ions during the synthesis process and storage in air. [8][9][10][11] The Li 2 CO 3 significantly promotes the gas evolution and increase the moisture of the cathode powder, which strongly related to the safety issue. [12][13][14] Furthermore, the LiOH on the cathode increases the powder pH value, causing the gelation of the slurry during the electrode fabrication process. The nickel-rich cathode with nickel content of ≤60% have acceptable amount of residual lithium compounds for the practical use. By contrast, the cathode with amount of nickel of ≥80% should be treated by additional process to reduce the residual lithium compounds ( Table 1). Furthermore, other powder properties, such as powder pH and moisture, should be carefully controlled when nickel contents were exceeded of ≥80%. Thus, for the practical application of these cathode materials, most battery companies have adapted the washing process, in which the cathode power was stirred in purified water for 20-40 min. [15,16] The washing process could greatly reduce the residual lithium compounds and powder pH value. [15] However, the washing process not only increases process time and capital cost but also make the nickel-rich cathode more chemically sensitive than nonwashed cathodes. [16] More seriously, the water washing deteriorates the thermal stability of the nickel-rich cathodes, indicating that the washing process should be substituted by other methods for the battery safety.Another important factor for the commercialization of the nickel-rich cathodes is the electrode density directly related to the energy density. In general, the nickel-rich cathodesThe layered nickel-rich cathode materials are considered as promising cathode materials for lithium-ion batteries (LIBs) due to their high reversible capacity and low cost. However, several significant challenges, such as the unstable powder properties and limited electrode density, hindered the practical application of the nickel-rich cathode materials with the nickel content over 80%. Herein, important stability issues and in-depth understanding of the nickel-rich cathode materials on the basis of the industrial electrode fabrication condition for the commercialization of the nickel-rich cathode m...

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“…Numerous coatings have been investigated for different NCMs (e.g., AlF3 [104], Al2O3 [47], ZrO2 [110], TiO2 [111,112], SiO2 [113]). All the coatings were shown to improve the cycle stability of the investigated active material when used in low amounts ( Figure 19A).…”

Section: Surface Coatings Of Li[nixcoymnz]o2 Materialsmentioning

confidence: 99%

Study of Cathode Materials for Lithium-Ion Batteries: Recent Progress and New Challenges

et al. 2017

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Amongst a number of different cathode materials, the layered nickel-rich LiNi y Co x Mn 1−y−x O 2 and the integrated lithium-rich xLi 2 MnO 3 ·(1 − x)Li[Ni a Co b Mn c ]O 2 (a + b + c = 1) have received considerable attention over the last decade due to their high capacities of~195 and~250 mAh·g −1 , respectively. Both materials are believed to play a vital role in the development of future electric vehicles, which makes them highly attractive for researchers from academia and industry alike. The review at hand deals with both cathode materials and highlights recent achievements to enhance capacity stability, voltage stability, and rate capability, etc. The focus of this paper is on novel strategies and established methods such as coatings and dopings.

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Improvement of electrochemical performance of nickel rich LiNi_0.6Co_0.2Mn_0.2O₂cathode active material by ultrathin TiO₂coating

Cited by 101 publications

References 32 publications

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Study of Cathode Materials for Lithium-Ion Batteries: Recent Progress and New Challenges

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Improvement of electrochemical performance of nickel rich LiNi0.6Co0.2Mn0.2O2cathode active material by ultrathin TiO2coating

Cited by 101 publications

References 32 publications

Improved electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode materials via incorporation of rubidium cations into the original Li sites

Improved electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode materials via incorporation of rubidium cations into the original Li sites

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Study of Cathode Materials for Lithium-Ion Batteries: Recent Progress and New Challenges

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Improvement of electrochemical performance of nickel rich LiNi_0.6Co_0.2Mn_0.2O₂cathode active material by ultrathin TiO₂coating

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites

Improved electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode materials via incorporation of rubidium cations into the original Li sites