Lithium-deficient LiYMn2O4 spinels (0.9≤Y&lt;1): Lithium content, synthesis temperature, thermal behaviour and electrochemical properties

Pascual, L.; Pérez-Revenga, M. L.; Rojas, R.M.; Rojo, J. M.; Amarilla, José Manuel

doi:10.1016/j.electacta.2005.09.008

Cited by 13 publications

(4 citation statements)

References 26 publications

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“…3 However, LMO suffers from capacity loss during charge-discharge cycles and this has impeded its commercial utilization. 4 The capacity loss is generally caused by the following factors: (1) Jahn-Teller distortion at the surface of LMO; 5 (2) the dissolution of Mn 3+ into the electrolyte at high temperature; 6 (3) the decomposition of electrolyte at high voltage. 7 It has been reported that when LMO is doped with some cations (Cr 3+ , Co 3+ , Ni 2+ , Al 3+ , etc.)…”

Section: Introductionmentioning

confidence: 99%

Using graphene nanosheets as a conductive additive to enhance the rate performance of spinel LiMn2O4 cathode material

Jiang

Cui

2013

Phys. Chem. Chem. Phys.

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Graphene nanosheets (GNs) were directly used as a type of novel but powerful planar conductive additive in spinel LiMn2O4 (LMO)-based electrodes, to improve the low electronic conductivity of LMO. It was found that the specific capacity and cycling performance of LMO were obviously enhanced when GNs co-existed with acetylene black (AB), a conventional carbon-based conductive agent, at an appropriate weight ratio in the LMO-based electrode (GNs and AB were 5 wt% and 10 wt% of the total weight, respectively). The unusual phenomenon was attributed to the following two reasons: (i) the planar GNs could bridge LMO particles more effectively via a "plane-to-point" conducting mode; (ii) AB particles might serve as the fillings in the electrode and connect the isolated LMO particles to GNs through a "filling effect", thereby constructing a novel and more effective conducting network. In this way, the synergy effect between the "plane-to-point" conducting mode (due to GNs) and the "filling" mode (due to AB) significantly decreased the charge-transfer resistance of the LMO-based electrode. With the much faster charge-transfer process, the rate performance of LMO was greatly enhanced. In contrast, when GNs were in excess, the effective conducting network was weakened by the agglomeration of GNs and the absence of AB, so the conductivity and the rate performance of LMO were not improved and even decreased.

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Section: Introductionmentioning

confidence: 99%

Using graphene nanosheets as a conductive additive to enhance the rate performance of spinel LiMn2O4 cathode material

Jiang

Cui

2013

Phys. Chem. Chem. Phys.

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“…MN exhibits a high theoretical capacity of 200 mAhg − 1 , calculated from desodiated Mn 0.67 Ni 0.33 O 2 . This capacity is higher than that of olivine LiFePO 4 (170 mAhg − 1 ) and spinel LiMn 2 O 4 (148 mAhg − 1 ), two of the most used cathodes in commercial LIBs [25,49,50]. Layered-MN, with a high working voltage (~3.8 V), exhibits one of the higher specific energies (~750 Whkg − 1 ) amongst the cathodes for SIBs [12,46,51,52].…”

Section: Introductionmentioning

confidence: 93%

Studies on sodium-ion batteries: Searching for the proper combination of the cathode material, the electrolyte and the working voltage. The role of magnesium substitution in layered manganese-rich oxides, and pyrrolidinium ionic liquid

Santa-María

Morales

Río

et al. 2023

Electrochimica Acta

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“…[1][2][3] In recent years, extensive attention has been paid to the spinel LiMn 2 O 4 compounds due to low cost, low toxicity, and excellent voltage profile characteristics. [4][5][6][7] The rate capability is determined by the Li ion diffusion during Li intercalation/deintercalation process. It is expected that for smaller particle size the diffusion length should be smaller and hence the electrode kinetics should be faster.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanocrystallinity on the electrochemical performance of LiMn2O4 cathode

Singhal

Resto

Katiyar

2009

Journal of Renewable and Sustainable Energy

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In the present work, we have synthesized nanocrystalline LiMn 2 O 4 of different grain sizes, for application to Li ion rechargeable batteries. LiMn 2 O 4 cathode powder was synthesized by sol-gel method and was high-energy ball milled for 8 and 16 h, respectively. The particle sizes of pure, 8 h, and 16 h ball-milled samples were determined from TEM and measured as ϳ225, 40, and 10 nm, respectively. The initial discharge capacity of the pure LiMn 2 O 4 cathode material was found to be about 128.75 mAh/ g, which was found to decrease on reducing the particle size.

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Lithium-deficient LiYMn2O4 spinels (0.9≤Y<1): Lithium content, synthesis temperature, thermal behaviour and electrochemical properties

Cited by 13 publications

References 26 publications

Using graphene nanosheets as a conductive additive to enhance the rate performance of spinel LiMn2O4 cathode material

Using graphene nanosheets as a conductive additive to enhance the rate performance of spinel LiMn2O4 cathode material

Studies on sodium-ion batteries: Searching for the proper combination of the cathode material, the electrolyte and the working voltage. The role of magnesium substitution in layered manganese-rich oxides, and pyrrolidinium ionic liquid

Effect of nanocrystallinity on the electrochemical performance of LiMn2O4 cathode

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