Enhanced electrochemical performance of Ti-doped Li1.2Mn0.54Co0.13Ni0.13O2 for lithium-ion batteries

Feng, Xin; Gao, Yurui; Ben, Liubin; Yang, Zhenzhong; Wang, Zhaoxiang; Chen, Liquan

doi:10.1016/j.jpowsour.2016.03.101

Cited by 144 publications

(62 citation statements)

References 51 publications

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“…Both the reversible capacity and the discharge potential remain stable thereafter. [15] These results imply that Li-TM cation mixing is thermodynamically stable in the Li-rich materials and that the inactive component (Li 2 TiO 3 and Li 3 NbO 4 ) can be activated by forming binary composites, showing high reversible capacity via O redox reactions. Moreover, Li 2 TiO 3 -LiFeO 2 with a Li-TM mixing Li-layer (a hybrid structure of 13% C2/c and 87% Fm m 3 ) was synthesized in different laboratories.…”

Section: Introductionmentioning

confidence: 86%

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Liu

Shen

et al. 2019

Advanced Energy Materials

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Li‐rich layered metal oxides are one type of the most promising cathode materials in lithium‐ion batteries but suffer from severe voltage decay during cycling because of the continuous transition metal (TM) migration into the Li layers. A Li‐rich layered metal oxide Li1.2Ti0.26Ni0.18Co0.18Mn0.18O2 (LTR) is hereby designed, in which some of the Ti4+ cations are intrinsically present in the Li layers. The native Li–Ti cation mixing structure enhances the tolerance for structural distortion and inhibits the migration of the TM ions in the TMO2 slabs during (de)lithiation. Consequently, LTR exhibits a remarkable cycling stability of 97% capacity retention after 182 cycles, and the average discharge potential drops only 90 mV in 100 cycles. In‐depth studies by electron energy loss spectroscopy and aberration‐corrected scanning transmission electron microscopy demonstrate the Li–Ti mixing structure. The charge compensation mechanism is uncovered with X‐ray absorption spectroscopy and explained with the density function theory calculations. These results show the superiority of introducing transition metal ions into the Li layers in reinforcing the structural stability of the Li‐rich layered metal oxides. These findings shed light on a possible path to the development of Li‐rich materials with better potential retention and a longer lifespan.

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Section: Introductionmentioning

confidence: 86%

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Liu

Shen

et al. 2019

Advanced Energy Materials

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“…Nayak et al investigated Mg‐ and Fe‐doped Li‐rich materials, and the results indicated that Mg and Fe suppress the activation of Li 2 MnO 3 during the initial cycling and partially prevent the layer‐to‐spinel transformation. Feng et al reported that Ti‐doped Li 1.2 Mn 0.54 Co 0.13 Ni 0.13 O 2 improves the long‐term cycling stability and conductivity. Leifer et al treated materials with NH 3 at high temperatures to produce electrodes with high stability and average voltage.…”

Section: Introductionmentioning

confidence: 99%

Effect of MgO and TiO₂ Coating on the Electrochemical Performance of Li‐Rich Cathode Materials for Lithium‐Ion Batteries

Xiao

Wang

et al. 2019

Energy Tech

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0.5Li2MnO3·0.5LiNi0.5Mn0.3Co0.2O2 cathode materials with nano‐MgO and nano‐TiO2 coating layers are synthesized via a facile approach. These nanocoating layers with a thickness of ≈20 nm are homogeneously coated on the surface of the materials. With the nano‐MgO and nano‐TiO2 coating layers, the modified materials deliver excellent electrochemical performance. Nano‐MgO‐coated and nano‐TiO2‐coated Li‐rich materials exhibit 147.56 and 137.96 mAh g−1 after 100 cycles at 1C rate and deliver 156.13 and 130.69 mAh g−1 at 2C rate, respectively, in the voltage range of 2.0–4.8 V. The materials with nano‐MgO and nano‐TiO2 coating layers also show a high discharge voltage retention of more than 90% after 50 cycles, low impedance for Li+ migration, and high diffusion coefficients of the lithium ions. Nano‐MgO and nano‐TiO2 coating layers help decrease the content of Li2CO3 on the surface of the materials and suppress side reactions. Thus, these materials play a significant role in strengthening the electrochemical performance of Li‐rich cathode materials.

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“…The ion doping modification can stabilize the cathode crystal structure and suppress the layer structural damage 13,14 . However, the surface coating modification technology has been complicated and the coating effect demonstrates to be difficult to control, while the ion doping modification shows the easy accessibility and obvious synthetic efficiency 15 . Therefore, the ion doping modification has been regarded as the competitive method to enhance the electrochemical properties of the Li-excess Li 1.20 [Mn 0.52 Ni 0.20 Co 0.08 ]O 2 materials.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Properties of Zr4+-doped Li1.20[Mn0.52Ni0.20Co0.08]O2 Cathode Material for Lithium-ion Battery at Elevated Temperature

Lü

Pang

Shi

et al. 2018

Sci Rep

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The typical co-precipitation method was adopted to synthesized the Li-excess Li1.20[Mn0.52−xZrxNi0.20Co0.08]O2 (x = 0, 0.01, 0.02, 0.03) series cathode materials. The influences of Zr4+ doping modification on the microstructure and micromorphology of Li1.20[Mn0.52Ni0.20Co0.08]O2 cathode materials were studied intensively by the combinations of XRD, SEM, LPS and XPS. Besides, after the doping modification with zirconium ions, Li1.20[Mn0.52Ni0.20Co0.08]O2 cathode demonstrated the lower cation mixing, superior cycling performance and higher rate capacities. Among the four cathode materials, the Li1.20[Mn0.50Zr0.02Ni0.20Co0.08]O2 exhibited the prime electrochemical properties with a capacity retention of 88.7% (201.0 mAh g−1) after 100 cycles at 45 °C and a discharge capacity of 114.7 mAh g−1 at 2 C rate. The EIS results showed that the Zr4+ doping modification can relieve the thickening of SEI films on the surface of cathode and accelerate the Li+ diffusion rate during the charge and discharge process.

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Enhanced electrochemical performance of Ti-doped Li1.2Mn0.54Co0.13Ni0.13O2 for lithium-ion batteries

Cited by 144 publications

References 51 publications

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Effect of MgO and TiO₂ Coating on the Electrochemical Performance of Li‐Rich Cathode Materials for Lithium‐Ion Batteries

Enhanced Electrochemical Properties of Zr4+-doped Li1.20[Mn0.52Ni0.20Co0.08]O2 Cathode Material for Lithium-ion Battery at Elevated Temperature

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Enhanced electrochemical performance of Ti-doped Li1.2Mn0.54Co0.13Ni0.13O2 for lithium-ion batteries

Cited by 144 publications

References 51 publications

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Li–Ti Cation Mixing Enhanced Structural and Performance Stability of Li‐Rich Layered Oxide

Effect of MgO and TiO2 Coating on the Electrochemical Performance of Li‐Rich Cathode Materials for Lithium‐Ion Batteries

Enhanced Electrochemical Properties of Zr4+-doped Li1.20[Mn0.52Ni0.20Co0.08]O2 Cathode Material for Lithium-ion Battery at Elevated Temperature

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Effect of MgO and TiO₂ Coating on the Electrochemical Performance of Li‐Rich Cathode Materials for Lithium‐Ion Batteries