Synthesis of a Co–Ni doped LiMn2O4 spinel cathode material for high-power Li-ion batteries by a sol–gel mediated solid-state route

Fang, Dao-Lai; Li, Junchao; Liu, Xin; Huang, Pengfei; Xu, Tian-Ran; Qian, Ming-Chuan; Zheng, Cheng

doi:10.1016/j.jallcom.2015.03.243

Cited by 56 publications

(23 citation statements)

References 37 publications

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“…As shown here, the characteristic peaks of all these samples match with that of LiMn 2 O 4 (JCPDS No. 35-0782), implying that the Cu-doping strategy have no material impact on the inherent structure of LiMn 2 O 4 [17,33], where lithium and manganese ions occupy the tetrahedral sites (8a) and octahedral sites (16d), respectively. According to the reported research result, the (220) characteristic peak may be observed if other cations occupied the tetrahedral sites [34].…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Zhao

Bai

et al. 2018

Materials

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The LiCuxMn1.95−xSi0.05O4 (x = 0, 0.02, 0.05, 0.08) samples have been obtained by a simple solid-state method. XRD and SEM characterization results indicate that the Cu-Si co-doped spinels retain the inherent structure of LiMn2O4 and possess uniform particle size distribution. Electrochemical tests show that the optimal Cu-doping amount produces an obvious improvement effect on the cycling stability of LiMn1.95Si0.05O4. When cycled at 0.5 C, the optimal LiCu0.05Mn1.90Si0.05O4 sample exhibits an initial capacity of 127.3 mAh g−1 with excellent retention of 95.7% after 200 cycles. Moreover, when the cycling rate climbs to 10 C, the LiCu0.05Mn1.90Si0.05O4 sample exhibits 82.3 mAh g−1 with satisfactory cycling performance. In particular, when cycled at 55 °C, this co-doped sample can show an outstanding retention of 94.0% after 100 cycles, whiles the LiMn1.95Si0.05O4 only exhibits low retention of 79.1%. Such impressive performance shows that the addition of copper ions in the Si-doped spinel effectively remedy the shortcomings of the single Si-doping strategy and the Cu-Si co-doped spinel can show excellent cycling stability.

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Section: Resultsmentioning

confidence: 99%

“…According to the existing literatures [15,16,17,18], the body-doping strategy can improve the cycling stability to some degree by introducing other cations in the spinel structure. The common doping ions mainly include the monovalent ion (Li + ) [19,20], divalent ions (Mg 2+ , Zn 2+ , Cu 2+ , etc.)…”

Section: Introductionmentioning

confidence: 99%

Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Zhao

Bai

et al. 2018

Materials

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“…21 Single or multi-metal doping with metal ions, including Al, Ni, Co, Fe, Mg, Cu, V, Sm and Zn, was extensively investigated for optimizing the electrochemical performance of Li-ion batteries, among which, Ni-doped LiMn 2 O 4 has become one of the current research interests for a high potential cathode. [77][78][79][80][81][82][83][84][85][86][87] respectively, which signicantly improved the structural stability and suppressed the Jahn-Teller distortion, so that a far higher reversible capacity was obtained. Cui et al embedded Sb ions in a LMO crystal, and even though the impure phase of LiSbO 3 appeared, the composite featured higher cycling and rate capacities than the pure LMO material.…”

Section: Crystalline Dopingmentioning

confidence: 99%

Research progress on design strategies, synthesis and performance of LiMn₂O₄-based cathodes

Mao

Guo

2015

RSC Adv.

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Spinel LiMn2O4 (LMO)-based composites, due to their combination of low toxicity, abundant natural resources, and excellent electrochemical performance, are regarded as promising candidate cathode materials for lithium ion batteries. Current energy storage demands are not being met with existing materials, however, because of their defects, such as fast capacity fading, low rate capability, and low specific capacity in practical applications. Manganese dissolution during electrochemical processes bears the major responsibility for capacity loss, apart from the electrolyte factor. Low electrical conductivity, low ionic diffusion efficiency, and large structural variation have adverse effects on the electrochemical performance of materials. With respect to these drawbacks, significant progress has been made recently on optimizing the performance of LMO-based cathode materials. In this work, we review recent progress in 1 structural design, designing composites with graphene/carbon nanotubes, crystalline doping, and coatings for improving the electrochemical performance of these cathode materials. Spinel LiMn 2 O 4 (LMO)-based composites, due to their combination of low toxicity, abundant natural resources, and excellent electrochemical performance, are regarded as promising candidate cathode materials for lithium ion batteries. Current energy storage demands are not being met with existing materials, however, because of their defects, such as fast capacity fading, low rate capability, and low specific capacity in practical applications. Manganese dissolution during electrochemical processes bears the major responsibility for capacity loss, apart from the electrolyte factor. Low electrical conductivity, low ionic diffusion efficiency, and large structural variation have adverse effects on the electrochemical performance of materials. With respect to these drawbacks, significant progress has been made recently on optimizing the performance of LMO-based cathode materials. In this work, we review recent progress in 1 structural design, designing composites with graphene/carbon nanotubes, crystalline doping, and coatings for improving the electrochemical performance of these cathode materials.

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“…119 mAh g −1 reversible capacity and capacity retention about 94% after 80 cycles were obtained for Li 1.1 Mn 1.85 Co 0.075 Ni 0.075 O 4 and potential range from 3 to 4.3 V [29]. Fang et al prepared LiMn 1.95 Ni 0.025 Co 0.025 O 4 by sol-gel mediated solid-state route at 650 °C, using highly dispersed ultra-fine Mn 3 O 4 particles as a Mn source [30]. As-obtained cathode materials show a perfect capacity retention of about 93% at a 1 C discharge rate.…”

Section: Introductionmentioning

confidence: 99%

Cryochemically Processed Li1+yMn1.95Ni0.025Co0.025O4 (y = 0, 0.1) Cathode Materials for Li-Ion Batteries

et al. 2018

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A new route for the preparation of nickel and cobalt substituted spinel cathode materials (LiMn1.95Co0.025Ni0.025O4 and Li1.1Mn1.95Co0.025Ni0.025O4) by freeze-drying of acetate precursors followed by heat treatment was suggested in the present work. The experimental conditions for the preparation single-phase material with small particle size were optimized. Single-phase spinel was formed by low-temperature annealing at 700 °C. For discharge rate 0.2 C, the reversible capacities 109 and 112 mAh g−1 were obtained for LiMn1.95Co0.025Ni0.025O4 and Li1.1Mn1.95Co0.025Ni0.025O4, respectively. A good cycle performance and capacity retention about 90% after 30 cycles at discharge rate 0.2–4 C were observed for the materials cycled from 3 to 4.6 V vs. Li/Li+. Under the same conditions pure LiMn2O4 cathode materials represent a reversible capacity 94 mAh g−1 and a capacity retention about 80%. Two independent experimental techniques (cyclic voltammetry at different scan rates and electrochemical impedance spectroscopy) were used in order to investigate the diffusion kinetics of lithium. This study shows that the partial substitution of Mn in LiMn2O4 with small amounts of Ni and Co allows the cyclability and the performance of LiMn2O4-based cathode materials to be improved.

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Synthesis of a Co–Ni doped LiMn2O4 spinel cathode material for high-power Li-ion batteries by a sol–gel mediated solid-state route

Cited by 56 publications

References 37 publications

Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Research progress on design strategies, synthesis and performance of LiMn₂O₄-based cathodes

Cryochemically Processed Li1+yMn1.95Ni0.025Co0.025O4 (y = 0, 0.1) Cathode Materials for Li-Ion Batteries

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Synthesis of a Co–Ni doped LiMn2O4 spinel cathode material for high-power Li-ion batteries by a sol–gel mediated solid-state route

Cited by 56 publications

References 37 publications

Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Enhanced Cycling Stability of LiCuxMn1.95−xSi0.05O4 Cathode Material Obtained by Solid-State Method

Research progress on design strategies, synthesis and performance of LiMn2O4-based cathodes

Cryochemically Processed Li1+yMn1.95Ni0.025Co0.025O4 (y = 0, 0.1) Cathode Materials for Li-Ion Batteries

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Research progress on design strategies, synthesis and performance of LiMn₂O₄-based cathodes