Synthesis and superior cathode performance of sandwiched LiMn2O4@rGO nanocomposites for lithium-ion batteries

Chen, Yinghao; Tian, Yulan; Qiu, Yunzhong; Liu, Zhifang; He, Hailin; Li, Baojun; Cao, Huaqiang

doi:10.1016/j.mtadv.2018.12.001

Cited by 20 publications

(25 citation statements)

References 48 publications

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“…Raman analysis for all LMO/1–5%wt. GO powders ( Figure 2 B) showed a typical spinel spectrum of LiMn 2 O 4 material (in the range of 100–700 cm −1 ) [ 23 , 24 , 25 ] as well as relatively sharp D and G peaks of graphene oxide structure (in the range of 1000–3500 cm −1 ) [ 44 ]. The characteristic bands with assignments for LMO and GO are summarized in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Seven bands were registered in the graphene oxide structure at 1150, 1350, 1490, 1595, 2696, 2945, and 3180 cm −1 (see Table 2 ) [ 44 , 53 , 54 ]. A, D, and G lines represented the most intensive peaks located at 1350 and 1595 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Their prepared composite material exhibited high ionic diffusivity and electrochemical performance [ 43 ]. Y. Chen et al [ 44 ] obtained an LMO/RGO nanocomposite using a low-temperature solvothermal process. They produced composites with 137.5 mAh g −1 of initial discharge capacity at a 0.5 C rate, while after 200 charging and discharging cycles, 75.6% of initial capacity remained [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

“…Y. Chen et al [ 44 ] obtained an LMO/RGO nanocomposite using a low-temperature solvothermal process. They produced composites with 137.5 mAh g −1 of initial discharge capacity at a 0.5 C rate, while after 200 charging and discharging cycles, 75.6% of initial capacity remained [ 44 ]. Hybrid materials composed of LMO/RGO was synthesized by a microwave-assisted hydrothermal method by S.-M. Bak et al [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

“…The graphene-modified LMO material achieved 127 mAh g −1 of initial discharge capacity, while the after 100 charging and discharging cycles capacity retention rate was 96.2% [ 46 ]. All the aforementioned works [ 42 , 43 , 44 , 45 , 46 ] have claimed that coating LiMn 2 O 4 with graphene led to the enhanced electrochemical performances due to the establishment of fast Li + channels and improved structural stability of the LMO material.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

et al. 2021

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In this work, a facile, wet chemical synthesis was utilized to achieve a series of lithium manganese oxide (LiMn2O4, (LMO) with 1–5%wt. graphene oxide (GO) composites. The average crystallite sizes estimated by the Rietveld method of LMO/GO nanocomposites were in the range of 18–27 nm. The electrochemical performance was studied using CR2013 coin-type cell batteries prepared from pristine LMO material and LMO modified with 5%wt. GO. Synthesized materials were tested as positive electrodes for Li-ion batteries in the voltage range between 3.0 and 4.3 V at room temperature. The specific discharge capacity after 100 cycles for LMO and LMO/5%wt. GO were 84 and 83 mAh g−1, respectively. The LMO material modified with 5%wt. of graphene oxide flakes retained more than 91% of its initial specific capacity, as compared with the 86% of pristine LMO material.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

et al. 2021

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K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Zhuang

Xie

et al. 2019

Advanced Energy Materials

126

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In this work, an ether‐based electrolyte is adopted instead of conventional ester‐based electrolyte for an Sb2O3‐based anode and its enhancement mechanism is unveiled for K‐ion storage. The anode is fabricated by anchoring Sb2O3 onto reduced graphene oxide (Sb2O3‐RGO) and it exhibits better electrochemical performance using an ether‐based electrolyte than that using a conventional ester‐based electrolyte. By optimizing the concentration of the electrolyte, the Sb2O3‐RGO composite delivers a reversible specific capacity of 309 mAh g−1 after 100 cycles at 100 mA g−1. A high specific capacity of 201 mAh g−1 still remains after 3300 cycles (111 days) at 500 mA g−1 with almost no decay, exhibiting a longer cycle life compared with other metallic oxides. In order to further reveal the intrinsic mechanism, the energy changes for K atom migrating from surface into the sublayer of Sb2O3 are explored by density functional theory calculations. According to the result, the battery using the ether‐based electrolyte exhibits a lower energy change and migration barrier than those using other electrolytes for K‐ion, which is helpful to improve the K‐ion storage performance. It is believed that the work can provide deep understanding and new insight to enhance electrochemical performance using ether‐based electrolytes for KIBs.

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LiNi_0.5Mn_1.5O₄ Thin Films Grown by Magnetron Sputtering under Inert Gas Flow Mixtures as High‐Voltage Cathode Materials for Lithium‐Ion Batteries

et al. 2022

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Delivering a commercial high‐voltage spinel LiNi0.5Mn1.5O4 (LNMO) cathode electrode for Li‐ion batteries would result in a significant step forward in terms of energy density. However, the structural ordering of the spinel and particle size have considerable effects on the cathode material's cyclability and rate capability, which are crucial challenges to address. Here, a novel mid‐frequency alternating current dual magnetron sputtering method was presented, using different Ar‐N2 gas mixtures ratios for the process gas to prepare various LNMO thin films with highly controlled morphology and particle size; as determined from X‐ray diffraction, Raman spectroscopy and electron microscopy. It resulted in enhanced cycling and rate performance. This processing method delivered N‐containing LNMO thin film electrodes with up to 15 % increased discharge capacity at 1 C (120 mAh g−1) with respect to standard LNMO (grown under only Ar gas flow) thin film electrodes, along with outstanding rate performance up to 10 C (99 mAh g−1) in the operating voltage window 3.5–4.85 V vs. Li+/Li. Besides, electrochemical impedance spectroscopy results showed that the intricate phase transitions present in standard LNMO electrodes were almost suppressed in N‐containing LNMO thin films grown under different Ar‐N2 gas flow mixtures.

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Synthesis and superior cathode performance of sandwiched LiMn2O4@rGO nanocomposites for lithium-ion batteries

Cited by 20 publications

References 48 publications

Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

LiNi_0.5Mn_1.5O₄ Thin Films Grown by Magnetron Sputtering under Inert Gas Flow Mixtures as High‐Voltage Cathode Materials for Lithium‐Ion Batteries

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Synthesis and superior cathode performance of sandwiched LiMn2O4@rGO nanocomposites for lithium-ion batteries

Cited by 20 publications

References 48 publications

Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

LiNi0.5Mn1.5O4 Thin Films Grown by Magnetron Sputtering under Inert Gas Flow Mixtures as High‐Voltage Cathode Materials for Lithium‐Ion Batteries

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Product

Resources

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K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

LiNi_0.5Mn_1.5O₄ Thin Films Grown by Magnetron Sputtering under Inert Gas Flow Mixtures as High‐Voltage Cathode Materials for Lithium‐Ion Batteries