Effective enhancement of electrochemical performance for spherical spinel LiMn2O4 via Li ion conductive Li2ZrO3 coating

Yi, Xin; Wang, Xianyou; Ju, Bowei; Shu, Hongbo; Wen, Weicheng; Yu, Ruizhi; Wang, Di; Yang, Xiukang

doi:10.1016/j.electacta.2014.04.148

Cited by 48 publications

(19 citation statements)

References 38 publications

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“…Particularly, Yi et al [20] reported that 3 wt.% Li 2 ZrO 3 coated LiMn 2 O 4 exhibited excellent electrochemical performance. Miao et al [21] also successfully achieved the performance improvement of 0.4Li 2 MnO 3 $0.6LiNi 1/3 Co 1/3 Mn 1/3 O 2 through Li 2 ZrO 3 surface coating.…”

Section: Introductionmentioning

confidence: 98%

“…Recently, several Li-contained oxides, such as LiAlO 2 [18], Li 3x La 2/3Àx TiO 3 [19] and Li 2 ZrO 3 [20,21] have effectively enhanced the electrochemical performances for cathode materials and aroused much attention since they have good conductivities and also provide the tunnels for Li þ transportation during charge/ discharge processes [17e21]. Particularly, Yi et al [20] reported that 3 wt.% Li 2 ZrO 3 coated LiMn 2 O 4 exhibited excellent electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

Zhang

Sun

et al. 2015

Journal of Power Sources

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

Zhang

Sun

et al. 2015

Journal of Power Sources

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“…19 Wang et al coated spherical spinel LiMn 2 O 4 with Li 2 ZrO 3 layer via a sol−gel method, and the electrochemical performances were improved. 20 To the best of our knowledge, the coatings of Li 2 ZrO 3 on the cathodes reported previously all need to first synthesize cathode materials, and then the as-synthesized cathodes are coated with Li 2 ZrO 3 , which is also called postcoating route. Through comparing the lattice parameters of bare LiNi 0.…”

Section: Introductionmentioning

confidence: 99%

High Rate Capability and Excellent Thermal Stability of Li⁺-Conductive Li₂ZrO₃-Coated LiNi_1/3Co_1/3Mn_1/3O₂ via a Synchronous Lithiation Strategy

Zhang

Gao

et al. 2015

J. Phys. Chem. C

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A novel synchronous lithiation route has been successfully used to coat Li + -conductive Li 2 ZrO 3 on the surface of LiNi 1/3 Co 1/3 Mn 1/3 O 2 (Li 2 ZrO 3 @LNCMO). In this strategy, Li 2 ZrO 3 layer and LiNi 1/3 Co 1/3 Mn 1/3 O 2 host simultaneously form from ZrO 2 @Ni 1/3 Co 1/3 Mn 1/3 C 2 O 4 ·xH 2 O precursor. In compared to bare LNCMO, the reversible capacity, cycling performance, thermal stability, rate capability, and polarization of Li 2 ZrO 3 @LNCMO have all been greatly improved. At 0.1 and 10 C, the specific capacity of Li 2 ZrO 3 @LNCMO is 192 and 106 mAh g −1 , respectively, while they are 178 and 46 mAh g −1 for bare LNCMO. At a current density of 5 C, the capacity retention of Li 2 ZrO 3 @LNCMO at 25 and 55°C after 400 cycles is enhanced to 93.8% and 85.1%, respectively, compared to 69.2% and 37.4% of bare LNCMO. The largely enhanced electrochemical performances of Li 2 ZrO 3 @LNCMO cathode can be attributed to the high Li-ion conductivity as well as the proctection of Li 2 ZrO 3 coating. Li + conductivity of Li 2 ZrO 3 @LNCMO is about 20 times higher than that of bare LNCMO. Moreover, the migration of partial Zr 4+ to the host LNCMO phase not only benefits Liion or electron conductivity but also alleviates the Li−Ni cation mixing and improves the structure stability. The cations migration, doping effect, and the reduced cation mixing further contribute to the electrochemical performance enhancement.

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“…In addition, the coated samples had similar charge voltages and higher discharge voltages compared to those of the bare sample, resulting in their higher discharge capacities. These results indicate that the coatings effectively lowered electrode polarization and inner resistance . These improvements were due to the addition of x Li 2 O‐ y B 2 O 3 ‐ z LiF, which has a high ionic conductivity and a low electronic conductivity.…”

Section: Resultsmentioning

confidence: 89%

Enhanced Electrochemical Capability of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Materials Coated with Fluoroborate Glass for Lithium‐Ion Batteries

et al. 2017

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NCM) cathode material is coated with fluoroborate glass (xLi 2 O-yB 2 O 3 -zLiF) to improve the electrochemical performance of lithium-ion batteries. An xLi 2 O-yB 2 O 3 -zLiF layer was successfully coated onto the surface of NCM by using a solution-phase method. The resulting materials are characterized by using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The xLi 2 O-yB 2 O 3 -zLiF-coated NCM exhibits a superior discharge capacity, rate capability, and cycling stability than those of the uncoated material. Notably, the initial discharge capacity of bare and 2Li 2 O-B 2 O 3 -LiF-coated NCM were 182.1 and 207.5 mAhg À1 , respectively, in the voltage range from 2.5 to 4.5 V. At a rate of 5C, the discharge capacity of Li 2 O-B 2 O 3 -LiF-coated NCM is 144.4 mAhg À1 , whereas that of bare NCM is 76.7 mAhg À1 . After 50 cycles at a rate of 0.2C, the capacity retentions of Li 2 O-B 2 O 3 -LiF-, 2Li 2 O-B 2 O 3 -LiF-, Li 2 O-2B 2 O 3 -LiF-, and Li 2 O-B 2 O 3 -2LiF-coated NCM are 96.8, 97.2, 95.6, and 95.2%, respectively, whereas the capacity retention of bare NCM is 81.4%. Cyclic voltammetry and electrochemical impedance spectroscopy results indicate that the xLi 2 O-yB 2 O 3 -zLiF coating reduces electrode polarization and decreases charge-transfer resistance at the electrolyteelectrode interface, further improving the electrochemical activity of the NCM cathode material.

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Effective enhancement of electrochemical performance for spherical spinel LiMn2O4 via Li ion conductive Li2ZrO3 coating

Cited by 48 publications

References 38 publications

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

High Rate Capability and Excellent Thermal Stability of Li⁺-Conductive Li₂ZrO₃-Coated LiNi_1/3Co_1/3Mn_1/3O₂ via a Synchronous Lithiation Strategy

Enhanced Electrochemical Capability of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Materials Coated with Fluoroborate Glass for Lithium‐Ion Batteries

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Effective enhancement of electrochemical performance for spherical spinel LiMn2O4 via Li ion conductive Li2ZrO3 coating

Cited by 48 publications

References 38 publications

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

Improved electrochemical and thermal performances of layered Li[Li0.2Ni0.17Co0.07Mn0.56]O2 via Li2ZrO3 surface modification

High Rate Capability and Excellent Thermal Stability of Li+-Conductive Li2ZrO3-Coated LiNi1/3Co1/3Mn1/3O2 via a Synchronous Lithiation Strategy

Enhanced Electrochemical Capability of LiNi1/3Co1/3Mn1/3O2 Cathode Materials Coated with Fluoroborate Glass for Lithium‐Ion Batteries

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High Rate Capability and Excellent Thermal Stability of Li⁺-Conductive Li₂ZrO₃-Coated LiNi_1/3Co_1/3Mn_1/3O₂ via a Synchronous Lithiation Strategy

Enhanced Electrochemical Capability of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Materials Coated with Fluoroborate Glass for Lithium‐Ion Batteries