Cathode properties of phospho-olivine LiMPO4 for lithium secondary batteries

Okada, Shigeto; Sawa, Shoichiro; Egashira, Makoto; Yamaki, Jun Ichi; Tabuchi, Mitsuharu; Kageyama, Hiroyuki; Konishi, Tokuzo; Yoshino, Akira

doi:10.1016/s0378-7753(01)00631-0

Cited by 372 publications

(208 citation statements)

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“…In a more detailed analysis, the grains for annealed samples at higher magnifications (in Fig. 3c as a cathode material for lithium ion battery using non-aqueous solutions is scarcely realised because of the limitations such as obtaining pure phase [17][18], voltage instability window [12] and their poor practical discharge capacity [15][16]. By contrast, to the available reports in the literature [14][15][16][17][18][19][20], our results show that the Ni 3+ /Ni 2+ redox reaction is significant and found to be 45% reversible in aqueous solutions.…”

Section: Resultsmentioning

confidence: 99%

“…However, efforts in improving the electrolyte have recently made it possible to explore the LiCoPO 4 compound to about 5 V [9,13] [14][15][16] due to the difficulty in obtaining a pure phase of lithium nickel phosphate. It is reported [17][18] that stringent synthesis conditions are required to synthesis LiNiPO 4 .…”

Section: Introductionmentioning

confidence: 99%

“…It is reported [17][18] that stringent synthesis conditions are required to synthesis LiNiPO 4 . Few studies [14][15][16][17][18][19][20] on this material have also shown that lithium nickel phosphate is not electrochemically active; no lithium can be subsequently intercalated if it is charged over 5.2 V. With these reasons, LiNiPO 4 cathode was scarcely researched and the available literature [14][15][16][17][18][19][20] is limited only to non-aqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

Minakshi

Singh

Appadoo

et al. 2011

Electrochimica Acta

133

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. amorphous NiPO 4 and a minor product of nickel (II) hydroxide (β-NiOOH). During subsequent reduction, lithium ions are not fully intercalated, however, the structure is reversible and adequate for multiple cycles. The high potential in LiNiPO 4 looks to be very attractive in terms of high energy density, given the efficiency is improved.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

Minakshi

Singh

Appadoo

et al. 2011

Electrochimica Acta

133

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“…In the delithiated CoPO 4 , Co 3+ is stable as non spin-polarized with GGA, but more stable by several eV with GGA+U in the high spin t 4 2g e 2 g configuration at the calculated U value of 6.34 eV. As shown in Table III Ni Though LiNiPO 4 has been synthesized, no Li can be removed from it electrochemically 44 . Hence the voltage is probably larger than 5V, the limit of most electrolyte systems.…”

Section: Totalmentioning

confidence: 94%

First-principles prediction of redox potentials in transition-metal compounds withLDA+U

et al. 2004

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First-principles calculations within the Local Density Approximation (LDA) or Generalized Gradient Approximation (GGA), though very successful, are known to underestimate redox potentials, such as those at which lithium intercalates in transition metal compounds. We argue that this inaccuracy is related to the lack of cancellation of electron self-interaction errors in LDA/GGA and can be improved by using the DFT+U method with a self-consistent evaluation of the U parameter.We show that, using this approach, the experimental lithium intercalation voltages of a number of transition metal compounds, including the olivine Li x MPO 4 (M=Mn, Fe Co, Ni), layered Li x MO 2 (x =Co, Ni) and spinel-like Li x M 2 O 4 (M=Mn, Co), can be reproduced accurately.

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“…46 Usually, bulk LiFePO 4 is prepared by solid-state methods, where a stoichiometric mixture of iron compound, ammonium dihydrogen phosphate, NH 4 .H 2 PO 4 , and lithium hydroxide is heated and calcined several times. 47 Depending on the synthetic conditions, the capacity of the LiFePO 4 can reach high values, such as 115 mA h g -1 . 48 Recently, nanocrystalline LiFePO 4 powders were prepared by two different methods.…”

Section: Lithium Iron Phosphatementioning

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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Cathode properties of phospho-olivine LiMPO4 for lithium secondary batteries

Cited by 372 publications

References 3 publications

Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

First-principles prediction of redox potentials in transition-metal compounds withLDA+U

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

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