Facile and efficient fabrication of Li3PO4-coated Ni-rich cathode for high-performance lithium-ion battery

Zou, Pinjuan; Lin, Zhihua; Fan, Mengna; Wang, Fei; Liu, Yong; Xiong, Xunhui

doi:10.1016/j.apsusc.2019.144506

Cited by 145 publications

(73 citation statements)

References 40 publications

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“…As a result of the anisotropic lattice volume change, the microcrack propagation is more serious in those Ni-rich NMC cathodes (Liu et al, 2018;Fan et al, 2020). Several strategies, such as concentration gradient structure and grain boundary coating, have been developed to improve the structural stability of the polycrystalline NMC cathode (Kim et al, 2018;Ouyang et al, 2018;Su et al, 2019;Lee et al, 2020;Qu et al, 2020;Zou et al, 2020); nevertheless, the demands for higher volumetric energy density and cycling stability are still unsatisfied.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Manipulation of Single-Crystalline Lithium Nickel Manganese Cobalt Oxide Cathodes: A Review of Growth Mechanism

et al. 2020

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Lithium nickel manganese cobalt oxide (NMC) cathodes are of great importance for the development of lithium ion batteries with high energy density. Currently, most commercially available NMC products are polycrystalline secondary particles, which are aggregated by anisotropic primary particles. Although the polycrystalline NMC particles have demonstrated large gravimetric capacity and good rate capabilities, the volumetric energy density, cycling stability as well as production adaptability are not satisfactory. Well-dispersed single-crystalline NMC is therefore proposed to be an alternative solution for further development of high-energy-density batteries. Various techniques have been explored to synthesize the single-crystalline NMC product, but the fundamental mechanisms behind these techniques are still fragmented and incoherent. In this manuscript, we start a journey from the fundamental crystal growth theory, compare the crystal growth of NMC among different techniques, and disclose the key factors governing the growth of single-crystalline NMC. We expect that the more generalized growth mechanism drawn from invaluable previous works could enhance the rational design and the synthesis of cathode materials with superior energy density.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Manipulation of Single-Crystalline Lithium Nickel Manganese Cobalt Oxide Cathodes: A Review of Growth Mechanism

et al. 2020

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“…Furthermore, as shown in Figure 1b, while electrochemical tests on conventional LIBs have been conducted at various C-rates, such as 1C, 2C, 5C, and 10C, most ASSLBs have been tested with a low C-rate of 0.1C. [24,47,[53][54][55][56][57][58] More practically, the ASSLBs show extensively low specific capacities when it tested at a high C-rate such as 1C. However, conventional LIBs show high specific capacities even when they are tested at the high C-rates of 5C and 10C.…”

Section: Previous Research In All-solid-state Lithium Batteriesmentioning

confidence: 99%

Improvements to the Overpotential of All‐Solid‐State Lithium‐Ion Batteries during the Past Ten Years

Lee

Park

et al. 2020

Advanced Energy Materials

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tinuously verified via the development of solid electrolytes (SEs) and appropriate active materials, which have high ionic conductivities and high applicability to ASSLBs systems, respectively. Unlike conventional liquid LIBs, which utilize organic liquid electrolytes as lithium ions and electron transfer passages, ASSLBs use inorganic solid SEs for the same purposes. Thus, the ionic conductivities of SEs play a critical role in increasing electrochemical performance during cell tests. In this respect, the research approaches for SEs have mainly focused on increasing their ionic conductivities. Because of that reason, a variety of inorganic SEs have been developed (e.g., oxides, polymers, and sulfides). [7-13] Before 2010, the lithium ion conductivities of various SEs were much lower than the corresponding values of the liquid electrolytes. However, recent significant improvements in the ionic conductivities of SEs have resulted in novel designs of chemical elements, doping, and morphological control. [14-16] Among them, oxide, polymer, and sulfide SEs have been intensively developed because of their high ionic conductivities and mechanical advantages. [17-22] In particular, the recently developed sulfide SEs show high lithium ion conductivity, similar to the ionic conductivity of organic liquid electrolytes. Along with the development of SEs, much effort has been expended toward increasing the interfacial area and decreasing the side reactions between the SEs and the active materials via coatings and morphological control. [23-27] However, although the recently developed SEs have achieved high ionic conductivities, the electrochemical performance of the ASSLBs and power density have not reached commercialization standards compared to the case of conventional liquid LIBs. Given the low electrochemical performance of the ASSLBs in spite of the high ionic conductivities, the overall overpotential and electronic conductivity within the battery should be emphasized because it could affect the electrochemical performance during cell tests. Herein, we review recent progress in ASSLBs and their battery performance in terms of the materials and electrodes. In addition, we propose a future research direction for increasing the electrochemical performance and improving the overall overpotential property via novel electrode design. After the research that shows that Li 10 GeP 2 S 12 (LGPS)-type sulfide solid electrolytes can reach the high ionic conductivity at the room temperature, sulfide solid electrolytes have been intensively developed with regard to ionic conductivity and mechanical properties. As a result, an increasing volume of research has been conducted to employ all-solid-state lithium batteries in electric automobiles within the next five years. To achieve this goal, it is important to review the research over the past decade, and understand the requirements for future research necessary to realize the practical applications of all-solid-state lithium batteries. To date, research on all-solid-state lithium batt...

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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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Facile and efficient fabrication of Li3PO4-coated Ni-rich cathode for high-performance lithium-ion battery

Cited by 145 publications

References 40 publications

Synthesis and Manipulation of Single-Crystalline Lithium Nickel Manganese Cobalt Oxide Cathodes: A Review of Growth Mechanism

Synthesis and Manipulation of Single-Crystalline Lithium Nickel Manganese Cobalt Oxide Cathodes: A Review of Growth Mechanism

Improvements to the Overpotential of All‐Solid‐State Lithium‐Ion Batteries during the Past Ten Years

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

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