Enhanced electrochemical properties of Li(Ni0.4Co0.3Mn0.3)O2 cathode by surface modification using Li3PO4-based materials

Song, Han; Kim, Je Young; Kim, Ki Tae; Park, Yong Joon

doi:10.1016/j.jpowsour.2010.09.027

Cited by 127 publications

(68 citation statements)

References 29 publications

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“…The broad semicircle may consist of two overlapped semicircles. Generally, a semicircle in a high-frequency range shows impedance attributed to a solid electrolyte interface, while a semicircle in a relatively low-frequency range represents the charge-transfer resistance [34,35]. The size of the semicircle depends on the impedance value.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source

Park¹,

Park²

2016

Journal of Electrochemical Science and Technology

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The electrochemical performance of carbon-coated LiMn 2 O 4 nanoparticles was reported. The polydopamine layer was introduced as a new organic carbon source. The carbon layer was homogeneously coated onto the surface of the LiMn 2 O 4 nanoparticles because the polymerization process from the dopamine solution (in a buffer solution, pH 8.5) easily and uniformly formed a polydopamine layer. The phase integrity of LiMn 2 O 4 deteriorated during the carbon-coating process due to oxygen loss, although the main structure was maintained. The carbon-coated sample led to improved rate capability because of the effect of the conductive carbon layer. Moreover, the carbon coating also enhanced the cyclic performance. This indicates that the carbon layer may suppress unwanted side reactions with the electrolytes and compensate for the low electronic conductivity of the pristine LiMn 2 O 4 .

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Section: Resultsmentioning

confidence: 99%

Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source

Park¹,

Park²

2016

Journal of Electrochemical Science and Technology

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“…The R ct showed rapid increase with cycling, which was understood as the micro-crack defects increase with charge-discharge cycling and it, in turn, causes disintegration of active material which increase the R ct [40,41]. Park et al [42,43] and Lee et al [44] reported that it predominantly due to the side reactions arising from liquid electrolyte decomposition at high voltage, a resistive layer may impede ionic transport via the interface between cathode materials and liquid electrolyte, which would consequently have a detrimental effect on cycle performance of high voltage charged cells. It can be seen that the value of the pristine LiCoO 2 cells before cycle is 31.5 V but considerably increases after 50 cycles reached to 465 V. However, the R ct of the coated samples increases slowly especially for 3.0 wt.…”

Section: Electrochemical Impedancementioning

confidence: 99%

Enhanced high-voltage properties of LiCoO2 coated with Li[Li0.2Mn0.6Ni0.2]O2

Cao

Peng

et al. 2014

Electrochimica Acta

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“…However, the energy densities of commercial Li-ion batteries using LiCoO 2 as a cathode cannot satisfy the demand of many of these applications [6][7][8][9][10]; new high-capacity cathode materials are therefore required. The layered Li-rich materials in the Li-Mn-Ni oxide system, which have higher energy densities (~250 mAh g −1 ) than other cathode materials such as LiCoO 2 [11][12][13][14][15][16][17][18], have attracted significant attention as promising new cathode materials.…”

Section: Introductionmentioning

confidence: 99%

Attachment of Li[Ni0.2Li0.2Mn0.6]O2 Nanoparticles to the Graphene Surface Using Electrostatic Interaction Without Deterioration of Phase Integrity

Pyun

Park

2016

Nanoscale Res Lett

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In this article, we report a facile approach to enhance the electrochemical performance of Li-rich oxides with vulnerable phase stability. The Li-rich oxide nanoparticles were attached to the surface of graphene; the graphene surface acted as a matrix with high electronic conductivity that compensated for the low conductivity and enhanced the rate capability of the oxides. Our novel approach constitutes a direct assembly of two materials via electrostatic interaction, without a high-temperature heat treatment. The inevitable deterioration in phase integrity of previous composites between carbon and Li-rich oxides resulted from the reaction of oxygen in the structure with carbon during the heat-treatment process. However, our new method successfully attached Li-rich nanoparticles to the surface of graphene, without a phase change of the oxides. The resulting graphene/Li-rich oxide composites exhibited superior capacity and rate capability compared to their pristine Li-rich counterparts.

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Enhanced electrochemical properties of Li(Ni0.4Co0.3Mn0.3)O2 cathode by surface modification using Li3PO4-based materials

Cited by 127 publications

References 29 publications

Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source

Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source

Enhanced high-voltage properties of LiCoO2 coated with Li[Li0.2Mn0.6Ni0.2]O2

Attachment of Li[Ni0.2Li0.2Mn0.6]O2 Nanoparticles to the Graphene Surface Using Electrostatic Interaction Without Deterioration of Phase Integrity

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Enhanced electrochemical properties of Li(Ni0.4Co0.3Mn0.3)O2 cathode by surface modification using Li3PO4-based materials

Cited by 127 publications

References 29 publications

Electrochemical Performance of Carbon Coated LiMn2O4Nanoparticles using a New Carbon Source

Electrochemical Performance of Carbon Coated LiMn2O4Nanoparticles using a New Carbon Source

Enhanced high-voltage properties of LiCoO2 coated with Li[Li0.2Mn0.6Ni0.2]O2

Attachment of Li[Ni0.2Li0.2Mn0.6]O2 Nanoparticles to the Graphene Surface Using Electrostatic Interaction Without Deterioration of Phase Integrity

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Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source

Electrochemical Performance of Carbon Coated LiMn₂O₄Nanoparticles using a New Carbon Source