Precipitation synthesis and enhanced electrochemical performance of graphene-modified LiMn2O4 for lithium-ion batteries

Li, Axiang; Shao, Zhongcai; Yang, Shoufeng; Li, Xuetian; Zhang, Aili

doi:10.1007/s11581-019-03432-4

Cited by 7 publications

(11 citation statements)

References 49 publications

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“…had the smallest average crystallite sizes. Comparing our materials with other works [ 42 , 43 , 44 , 45 , 46 ], the discharge capacity values were not high, which on the other side had a positive effect on the values of capacity retained after 100 charging and discharging cycles, and as a result, almost 100% of coulombic efficiency was revealed. This, in turn, indicated that by modifying the surface of the LMO material with graphene oxide flakes, the effect of shortening the transport path of electrons and Li ions (between the electrode and electrolyte) should be reached.…”

Section: Resultscontrasting

confidence: 50%

“…At 1, 50, and 100 C rates, the material obtained throughout this approach revealed a high specific capacity of 137, 117, and 101 mAh g −1 , respectively [ 45 ]. A. Li and co-authors proposed modifying LiMn 2 O 4 with graphene using a precipitation synthesis [ 46 ]. The initial discharge capacity of the graphene-modified LMO material was 127 mAh g −1 , with a capacity retention rate of 96.2% after 100 charging and discharging cycles [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

“…A. Li and co-authors proposed modifying LiMn 2 O 4 with graphene using a precipitation synthesis [ 46 ]. The initial discharge capacity of the graphene-modified LMO material was 127 mAh g −1 , with a capacity retention rate of 96.2% after 100 charging and discharging cycles [ 46 ]. The obtained results in our study seem to be promising, taking into account the relatively fast, non-toxic, and cost-effective chemical approach used for the modification of the LMO surface with graphene oxide flakes.…”

Section: Resultsmentioning

confidence: 99%

“…The obtained material revealed a high specific capacity of 137, 117, and 101 mAh g −1 at 1 C, 50 C, and 100 C rates, respectively [ 45 ]. The precipitation synthesis was developed to modify LiMn 2 O 4 with graphene by A. Li and co-authors [ 46 ]. 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 ].…”

Section: Introductionmentioning

confidence: 99%

“…The precipitation synthesis was developed to modify LiMn 2 O 4 with graphene by A. Li and co-authors [ 46 ]. 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: Resultscontrasting

confidence: 50%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

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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Review of the Scalable Core–Shell Synthesis Methods: The Improvements of Li‐Ion Battery Electrochemistry and Cycling Stability

2023

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The demand for lithium‐ion batteries has significantly increased due to the increasing adoption of electric vehicles (EVs). However, these batteries have a limited lifespan, which needs to be improved for the long‐term use needs of EVs expected to be in service for 20 years or more. In addition, the capacity of lithium‐ion batteries is often insufficient for long‐range travel, posing challenges for EV drivers. One approach that has gained attention is using core–shell structured cathode and anode materials. That approach can provide several benefits, such as extending the battery lifespan and improving capacity performance. This paper reviews various challenges and solutions by the core–shell strategy adopted for both cathodes and anodes. The highlight is scalable synthesis techniques, including solid phase reactions like the mechanofusion process, ball‐milling, and spray‐drying process, which are essential for pilot plant production. Due to continuous operation with a high production rate, compatibility with inexpensive precursors, energy and cost savings, and an environmentally friendly approach that can be carried out at atmospheric pressure and ambient temperatures. Future developments in this field may focus on optimizing core–shell materials and synthesis techniques for improved Li‐ion battery performance and stability.

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