Local Structural Studies of LiCryMn2-yO4 Cathode Materials for Li-Ion Batteries

Kaneko, Mayumi; Matsuno, Shinsuke; Miki, Tsuneharu; Nakayama, Masanobu; Ikuta, Hiromasa; Uchimoto, Yoshiharu; Wakihara, Masataka; Kawamura, Katsuyuki

doi:10.1021/jp0265337

Cited by 31 publications

(40 citation statements)

References 26 publications

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“…Many reports have emphasized on the influence of the nanosized particles on the better electrochemical performance of LiMn 2 O 4 [3,4,[28][29][30]. In addition to bare LiMn 2 O 4 , studies on different doping elements like Co, Cr, Al, Ni, Fe, Ru, etc., are reported in literatures [19,[31][32][33][34][35][36]. In the present work, nanoand submicron sized bare and doped LiMn 2 O 4 compounds have been prepared by means of polymer precursor method using the polymer, polyvinylpyrrolidone (PVP) under similar preparation conditions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Sakunthala

Reddy

Selvasekarapandian

et al. 2010

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Sakunthala

Reddy

Selvasekarapandian

et al. 2010

Electrochimica Acta

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“…Cations of Li, B, Mg, Al, Fe, Co, Ni and Zn have been investigated as possible dopants. 11,[148][149][150][151][152] Among these doped LiMn 2 O 4 materials, LiNi 0.5 Mn 1.5 O 2 is one of the most studied. [153][154][155][156] The presence of Ni stabilizes the octahedral spinel sites and although the intercalation of lithium decreases the average valence of manganese to values below 4.5, the distortion of the tetrahedral phase is not observed.…”

Section: Manganese Oxidesmentioning

confidence: 99%

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

Camilo¹,

Torresi²

2006

J. Braz. Chem. Soc.

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As celas de íon lítio disponíveis comercialmente, as quais são as mais avançadas entre as baterias recarregáveis disponíveis até agora, empregam óxidos de metais de transição microcristalinos como catodos, os quais funcionam como matrizes de inserção de lítio. Em busca por uma melhor performance eletroquímica, o uso de nanomateriais no lugar dos materiais convencionais tem emergido como excelente alternativa. Nesta revisão nós apresentaremos uma breve introdução sobre as motivações de usar materiais nanoestruturados como catodos em baterias de íon-lítio. Para ilustrar tais vantagens apresentamos exemplos de pesquisas relacionadas com a preparação e dados eletroquímicos dos mais usados catodos em nanoescala, tais como LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Commercially available lithium ion cells, which are the most advanced among rechargeable batteries available so far, employ microcrystalline transition metal oxides as cathodes, which function as Li insertion hosts. In search for better electrochemical performance the use of nanomaterials in place of these conventional ones has emerged as excellent alternative. In this review we present a brief introduction about the motivations to use nanostructured materials as cathodes in lithium ion batteries. To illustrate such advantages we present some examples of research directed toward preparations and electrochemical data of the most used cathodes in nanoscale, such as LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Keywords: nanotechnology, lithium-ion battery, cathode, nanoparticles Initial RemarksSince Sony introduced its 18650 cell in 1990, 1 Li-ion batteries with excellent electrochemical performance have been manufactured and occupied a prime position in the market place 2 to power portable and non-portable devices. [3][4][5] The reason for this relevance is that compared to traditional rechargeable batteries such as, lead acid and Ni-Cd, the lithium-ion battery shows several advantages, such as lighter in weight, smaller in dimension and higher energy density. 1 Moreover, although capacity values may be similar to other rechargeable systems, voltages are approximately three times higher, affording higher energy. 1 In general, the commercial lithium-ion batteries use graphite-lithium composite, Li x C 6 , as anode, lithium cobalt oxide, LiCoO 2 , as cathode and a lithium-ion conducting electrolyte. When the cell is charged, lithium is extracted from the cathode and inserted at the anode. On discharge, the lithium ions are released by the anode and taken up again by the cathode (Figure 1).Owing to the importance of lithium ion batteries, these cells are still object of intense research to enhance their properties and characteristics. The searches focus on all aspects of these batteries, including improved anodes, 6-8 cathodes 9-17 and electrolytes. [18][19][20][21][22] However, most of these efforts are concentrated in new cathode materials, since the most used cathode material (LiCoO 2 ) is expensive and is somewhat toxic.The active catho...

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“…Spinel LiMn 2 O 4 has been reported to possess specific advantages of its low internal resistance, long cycle life, fast charging time, high cell voltage, high load current, and high thermal stability as a cathode material for lithium-ion batteries [1][2][3][4][5][6][7]. Particularly, sustaining the internal cell resistance at low levels is the key to obtaining a high rate-capability that has been required for the fastcharging and high-current discharging.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies were investigated to avoid the unwanted phase transition by adopting unusual dopings or substitutions including transition metals, such as Ti, Cr, Co and Ni, and other elements, i.e., Mg and Al [4][5][6][7][8][9]. As an alternative choice, the substitution of heavy elements like W and Er were also studied with limited success due to their relatively large atomic or ionic size [10,11].…”

Section: Introductionmentioning

confidence: 99%

Phase evolution and Sn-substitution in LiMn2O4 thin films prepared by pulsed laser deposition

et al. 2008

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LiMn 2 O 4 thin films prepared on a Pt/Ti/SiO 2 /Si (100) substrate by pulsed laser deposition were studied with focusing on the effects of different processing conditions and Sn substitution on phase evolvement and surface microstructure. Major experimental parameters include substrate temperature up to 770°C and working oxygen pressure of 50-250 mTorr. LiMn 2 O 4 thin films became highly crystallized with increased grain sizes as the substrate temperature increased. Second phases such as LiMnO 2 and Li 2 Mn 2 O 4 were found at the temperature of 300 and 770°C, respectively. As an optimum condition, films grown at 450°C showed a homogeneous spinel phase with well-defined crystallinity and smooth surface. A high pressure of oxygen tended to promote crystallization and grain growth. Working pressure did not affect significantly the phase formation of the thin films except that unexpected LiMn 3 O 4 phase formed at the lowest oxygen pressure of 50 mTorr. Tin-substituted thin films showed lower Mn-O stretching vibrations, which suggests that more Li-ions can be inserted into vacant octahedral sites of the spinel structure.

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Local Structural Studies of LiCr_yMn₂_-_yO₄ Cathode Materials for Li-Ion Batteries

Cited by 31 publications

References 26 publications

Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

Phase evolution and Sn-substitution in LiMn2O4 thin films prepared by pulsed laser deposition

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