LaPO4-coated Li1.2Mn0.56Ni0.16Co0.08O2 as a cathode material with enhanced coulombic efficiency and rate capability for lithium ion batteries

Xie, Qingliang; Zhao, Chenhao; Zhang, Hu; Huang, Qi; Chen, Cheng; Liu, Kaiyu

doi:10.1039/c5ra13233a

Cited by 20 publications

(18 citation statements)

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“…The lattice spacing is around 0.47 nm which correspond to (003) planes of the rhombohedral phase (R 3m). 28,41 Elemental mapping images in Fig. 3(d-g) show the distribution of Ni, Mn, Co, and Zr in 1.5 wt% ZrO 2 coated NMC.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

“…[25][26][27] To address these issues, several strategies have been widely adopted including surface coatings of active materials, elemental doping on Ni, Mn or Co sites and tailoring the particle morphology. [6][7][8]12,[28][29][30][31][32][33] Amongst them, the surface coating of active materials has been widely accepted and employed to improve the performance of these materials. Several coating materials such as Al…”

Section: Introductionmentioning

confidence: 99%

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Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

et al. 2020

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Section: Electrochemical Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

et al. 2020

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“…[9][10][11][12][13] In this regard, multifarious modification approaches, such as doping and surface coating, have been intensively investigated. ), metal phosphates (AlPO 4 , [28] LaPO 4 , [29] Li 3 PO 4 , [30] FePO 4 /Li 3 PO 4 , [31] Li-Mn-PO 4 , [32] etc. [17][18][19] From this viewpoint, metal fluorides (FeF 3 , [20] MOF, [21,22] AlF 3 , [23,24] etc.…”

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confidence: 99%

Local Electric‐Field‐Driven Fast Li Diffusion Kinetics at the Piezoelectric LiTaO₃ Modified Li‐Rich Cathode–Electrolyte Interphase

et al. 2019

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HEVs (PHEVs), besides the traditional applications in portable devices. To build the next generation LIBs with higher performances, high energy density materials are urgently pursued worldwide. [1][2][3] Lithium-rich (Li-rich) materials, with the specific capacity over 260 mAh g −1 and energy density up to ≈1000 Wh kg −1 , [4] have attracted great interest in the past decades. It is reported that Li-rich materials are composed of two phases of Li 2 MnO 3 (C 2/m ) and LiMO 2 (R m 3 ) (M = Ni, Co, Mn, etc.). [5][6][7][8][9] Despite the above advantages, several concerns including structural instability and the resulted voltage degradation, as well as the poor diffusion kinetics at the interface have become the bottlenecks of Li-rich materials. [9][10][11][12][13] In this regard, multifarious modification approaches, such as doping and surface coating, have been intensively investigated. [14][15][16] Particularly, Li + diffusion at the cathode-electrolyte interphase (CEI) is widely regarded as the rate determining step in LIBs. [17][18][19] From this viewpoint, metal fluorides (FeF 3 , [20] MOF, [21,22] AlF 3 , [23,24] etc.), metal oxides (MgO, [25] Al 2 O 3 , [26,27] etc.), metal phosphates (AlPO 4 , [28] LaPO 4 , [29] Li 3 PO 4 , [30] FePO 4 /Li 3 PO 4 , [31] Li-Mn-PO 4 , [32] etc.), and those with similar structure of Li-rich Li 2 MnO 3 (Li 2 SiO 3 [33,34] and Li 2 SnO 3 , [35] ) have been widely applied to modify the surface of bulk Li-rich materials. Recently, fast lithium-ion conductors (LiVO 3 , [36] Li 2 ZrO 3 , [37] Li-La-Ti-O, [38,39] LiPON, [40] etc.) have also been proposed to decorate the surface of Li-rich cathodes to enhance the apparent diffusion coefficients. All the aforesaid surface modification materials, unexceptionally, have been proved to be effective in both stabilizing the structure and facilitating the Li + kinetics. Nevertheless, in general, the decoration layers themselves seem rather "passive" in promoting Li + diffusion. Assuming they are Li + conductive (e.g., solid electrolyte materials), fast Li + diffusion channels will be provided besides the general separation effect (in suppressing side reactions and inevitable TM dissolution). As for Li + insulators (e.g., metal fluorides), only the benefit of physical barriers could be exploited. Therefore, a more "initiative" function interface is imperative to be built to more effectively promote the Li + transport at the electrode-electrolyte interphase.It is noteworthy that piezoelectric material, as an important category in the energy-conversion community, works on the As one of the most promising cathodes for next-generation lithium ion batteries (LIBs), Li-rich materials have been extensively investigated for their high energy densities. However, the practical application of Li-rich cathodes is extremely retarded by the sluggish electrode-electrolyte interface kinetics and structure instability. In this context, piezoelectric LiTaO 3 is employed to functionalize the surface of Li 1.2 Ni 0.17 Mn 0.56 Co 0.07 O 2 (LNMCO), aiming to boost t...

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“…10 The LaPO 4 surface coating of NVPF was performed according to the procedure described in Refs. [21,22] with minor changes (see Materials and Methods). Based on the XRD results ( Figure 1) and the quantitative phase analysis of the coated sample (hereinafter referred as NVPF/LPO) using the Rietveld method (Table 1), it was found that the as-obtained composite material contains only two phases: Na 3 V 2 (PO 4 ) 2 F 3 and LaPO 4 .…”

Section: Resultsmentioning

confidence: 99%

“…There are some publications devoted to the use of LaPO 4 as a coating material to increase the high-rate capability of the lithium-rich cathode materials. However, the improvement was related to the protective activity of LaPO 4 from the electrode-electrolyte interaction [21,22]. On the other hand, some authors associate it with the increase in electrical conductivity due to the high ionic conductivity of LaPO 4 [23], but this statement is contradictory [24].…”

Section: Resultsmentioning

confidence: 99%

Effect of La3+ Modification on the Electrochemical Performance of Na3V2(PO4)2F3

2018

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La 3+ modification of Na 3 V 2 (PO 4) 2 F 3 was performed by the direct mechanochemically assisted solid-state synthesis of the Na 3 V 2−x La x (PO 4) 2 F 3 compositions, and by the LaPO 4 coating of the as-prepared Na 3 V 2 (PO 4) 2 F 3 via the precipitation method. It has been shown that no noticeable substitution of the V 3+ ions by the La 3+ ions occurs in the Na 3 V 2 (PO 4) 2 F 3 structure under the synthesis conditions; meanwhile, the introduction of the La 3+ ions into the reagent mixture leads to the formation of the LaPO 4 phase, and accordingly, an increase in the NaF/VPO 4 ratio. The latter results in the formation of the Na 3 PO 4 and Na 3 VF 6 surface impurity phases, which possess high ionic and electronic conductivity, respectively, and significantly enhances the electrical conductivity and the cycling performance of the composite cathode material both in Na and Li cells, while simple surface modification of Na 3 V 2 (PO 4) 2 F 3 by LaPO 4 via precipitation does not.

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LaPO⁴-coated Li_1.2Mn_0.56Ni_0.16Co_0.08O₂ as a cathode material with enhanced coulombic efficiency and rate capability for lithium ion batteries

Abstract: Layered Li[Li0.2Mn0.56Ni0.16Co0.08]O2 porous microspheres have been successfully synthesized by a urea combustion method, and then coated with appropriate amount of LaPO4via a facile chemical precipitation route.

Cited by 20 publications

References 42 publications

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

Local Electric‐Field‐Driven Fast Li Diffusion Kinetics at the Piezoelectric LiTaO₃ Modified Li‐Rich Cathode–Electrolyte Interphase

Effect of La3+ Modification on the Electrochemical Performance of Na3V2(PO4)2F3

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LaPO4-coated Li1.2Mn0.56Ni0.16Co0.08O2 as a cathode material with enhanced coulombic efficiency and rate capability for lithium ion batteries

Abstract: Layered Li[Li0.2Mn0.56Ni0.16Co0.08]O2 porous microspheres have been successfully synthesized by a urea combustion method, and then coated with appropriate amount of LaPO4via a facile chemical precipitation route.

Cited by 20 publications

References 42 publications

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li1.2Ni0.16Mn0.56Co0.08O2 cathode

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li1.2Ni0.16Mn0.56Co0.08O2 cathode

Local Electric‐Field‐Driven Fast Li Diffusion Kinetics at the Piezoelectric LiTaO3 Modified Li‐Rich Cathode–Electrolyte Interphase

Effect of La3+ Modification on the Electrochemical Performance of Na3V2(PO4)2F3

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LaPO⁴-coated Li_1.2Mn_0.56Ni_0.16Co_0.08O₂ as a cathode material with enhanced coulombic efficiency and rate capability for lithium ion batteries

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li_1.2Ni_0.16Mn_0.56Co_0.08O₂ cathode

Local Electric‐Field‐Driven Fast Li Diffusion Kinetics at the Piezoelectric LiTaO₃ Modified Li‐Rich Cathode–Electrolyte Interphase