Unraveling Na and F coupling effects in stabilizing Li, Mn-rich layered oxide cathodes via local ordering modification

Vanaphuti, Panawan; Bai, Jianming; Ma, Lu; Ehrlich, Steven N.; Kisslinger, Kim; Wang, Feng; Wang, Yan

doi:10.1016/j.ensm.2020.08.003

Cited by 50 publications

(45 citation statements)

References 42 publications

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“…40 In addition, the comodification with two elements was also investigated. The examples, K + and Ti 4+ , 41 Na + and F − , 42 Mg 2+ and F − , 43 as well as Mg 2+ and Al 3+44 codoped cathodes were well reported in the documents. Although doping can improve the electrochemical performance of Ni-rich cathode materials, there are some problems to be solved with the process parameters, and the selection of dopants, doping methods, doping concentration, and calcinating parameters needs to be optimized.…”

Section: Introductionmentioning

confidence: 81%

Feasible synthesis of NCM811 cathodes with controllable Li/Ni cationic mixing for enhanced electrochemical performance via a nano grinding assisted solid‐state approach

Dong

Zhang

et al. 2020

Int J Energy Res

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This paper reports a feasible approach to offer LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) layered cathode materials with enhanced lattice ordering and improved electrochemical performance through a nano grinding assisted solid-state reaction. Different from the commercial precursor method, oxide raw materials, NiO, CoO and MnO 2 , rather than the hydroxides, was employed as the starting raw material which was milled into submicron size, pressed into pellets and crushed into granular powder. After calcination under oxygen atmosphere under different temperature, such a simple approach provides layered cathode materials with controllable Li/Ni disordering. Powder XRD results show that when sintered at 800 C, a largest I(003)/I (104) ratio is observed, indicating that the cationic disordering is the lowest, as been confirmed by the XRD refinement data, showing that only 1.08% Ni is misplaced at 3b site. For the electrochemical test, the pNCM800 sample presented an initial specific discharge capacity of 203 mAh/g at 0.1C, together with a capacity retention of 91.77% after 100 cycles at 0.5C. Compared to the value of the sample obtained at normal routine (163.8 mAh/g and 74.85%), the improvement in electrochemical behavior is obvious. Furthermore, the rate performance is also improved, with a specific capacity of 144.1 mAh/g even at 5C rate. The reason for such enhancement could be ascribed to the better kinetic process with low interfacial resistance and fast Li diffusion contributed from the promoted lattice ordering. The results obtained in the experiments greatly indicate the significance of the approach in controlling the Li/Ni disordering, and thus offer an alternative routine for the mass production of layered cathode materials besides the so-called precursor method.

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Section: Introductionmentioning

confidence: 81%

Feasible synthesis of NCM811 cathodes with controllable Li/Ni cationic mixing for enhanced electrochemical performance via a nano grinding assisted solid‐state approach

Dong

Zhang

et al. 2020

Int J Energy Res

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“…This phenomenon has been observed in overstoichiometric lithium compounds, where lithium partially replaces transition metals (TMs) with typical feature of Li[Li x TM 1-x ]O 2 (TM: Ni, Co, Fe, Cu, etc.) [12][13][14] or Li 1 +x TM 1-x O 2 (TM: Ru and Ir) [15,16]. These materials provide a higher capacity than the theoretical value obtained from a redox pair TM.…”

Section: Introductionmentioning

confidence: 91%

“…The anionic redox process enables delivery of additional capacity, such that sodium ions can be additionally de/intercalated from/into the structure; namely, the combination of cationic and anionic redox reactions provides more capacity. This type of chemistry has been demonstrated in Li-rich manganese oxide systems (Li 2 MnO 3 [7][8][9], Li 1.2 TM 0.8 O 2 [10][11][12], and their derivatives [13][14][15][16]) that have provided capacities to their theoretical limit. These anionic redox can contribute to additional capacity, thereby increasing the specific energy density of the battery.…”

Section: Introductionmentioning

confidence: 93%

Recent Advances in Electrode Materials with Anion Redox Chemistry for Sodium-Ion Batteries

Voronina

Myung

2021

Energy Mater Adv

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The development of sodium-ion batteries (SIBs), which are promising alternatives to lithium-ion batteries (LIBs), offers new opportunities to address the depletion of Li and Co resources; however, their implementation is hindered by their relatively low capacities and moderate operation voltages and resulting low energy densities. To overcome these limitations, considerable attention has been focused on anionic redox reactions, which proceed at high voltages with extra capacity. This manuscript covers the origin and recent development of anionic redox electrode materials for SIBs, including state-of-the-art P2- and O3-type layered oxides. We sequentially analyze the anion activity–structure–performance relationship in electrode materials. Finally, we discuss remaining challenges and suggest new strategies for future research in anion-redox cathode materials for SIBs.

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“…The Na doping enhances the cation ordering through its substitution of Ni 2b, and the F doping decreases the oxygen loss due to the compensation of charge balance. The synergetic doping of cation and anion both increases the average voltage, [ 68 ] which could inspire the co‐deposition of LRLO and dopants for addressing the voltage fading issue in TFLBs.…”

Section: Cathode Materialsmentioning

confidence: 99%

Promising Electrode and Electrolyte Materials for High‐Energy‐Density Thin‐Film Lithium Batteries

Lin

et al. 2021

Energy & Environ Materials

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All-solid-state thin-film lithium batteries (TFLBs) are the ideal wireless power sources for on-chip micro/nanodevices due to the significant advantages of safety, portability, and integration. As the bottleneck for increasing the energy density of TFLBs, the key components of cathode, electrolyte, and anode are still underway to be improved. In this review, a brief history of TFLBs is first outlined by presenting several TFLB configurations. Based on the state-of-the-art materials developed for lithium-ion batteries (LIBs), the challenges and related strategies for the application of those potential electrode and electrolyte materials in TFLBs are discussed. Given the advanced manufacture and characterization techniques, the recent advances of TFLBs are reviewed for pursuing the high-energy-density and long-termdurability demands, which could guide the development of future TFLBs and analogous all-solid-state lithium batteries.

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Unraveling Na and F coupling effects in stabilizing Li, Mn-rich layered oxide cathodes via local ordering modification

Cited by 50 publications

References 42 publications

Feasible synthesis of NCM811 cathodes with controllable Li/Ni cationic mixing for enhanced electrochemical performance via a nano grinding assisted solid‐state approach

Feasible synthesis of NCM811 cathodes with controllable Li/Ni cationic mixing for enhanced electrochemical performance via a nano grinding assisted solid‐state approach

Recent Advances in Electrode Materials with Anion Redox Chemistry for Sodium-Ion Batteries

Promising Electrode and Electrolyte Materials for High‐Energy‐Density Thin‐Film Lithium Batteries

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