Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

Minakshi, Manickam; Singh, Pritam; Appadoo, Dominique; Martin, Danielle E.

doi:10.1016/j.electacta.2011.01.017

Cited by 127 publications

(79 citation statements)

References 27 publications

(35 reference statements)

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“…A similar welldefined redox behavior has been observed for nickel phosphates in aqueous solutions. 24,29 Based on this, these peaks can be ascribed to extraction and reversible intercalation of sodium from/into the NaNiPO 4 polymorphs resulting in Ni and Ni 2+ ions of oxidation and reduction respectively. The electrochemical performance of activated carbon was investigated for its suitability as a negative electrode.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, structural and electrochemical properties of sodium nickel phosphate for energy storage devices

et al. 2016

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fElectrochemical energy production and storage at large scale and low cost, is a critical bottleneck in renewable energy systems. Oxides and lithium transition metal phosphates have been researched for over two decades and many technologies based on them exist. Much less work has been done investigating the use of sodium phosphates for energy storage. In this work, the synthesis of sodium nickel phosphate at different temperatures is performed and its performance evaluated for supercapacitor applications. The electronic properties of polycrystalline NaNiPO 4 polymorphs, triphylite and maricite, t-and m-NaNiPO 4 are calculated by means of first-principle calculations based on spin-polarized Density Functional Theory (DFT). The structure and morphology of the polymorphs were characterized and validated experimentally and it is shown that the sodium nickel phosphate (NaNiPO 4 ) exists in two different forms (triphylite and maricite), depending on the synthetic temperature (300-550°C). The as-prepared and triphylite forms of NaNiPO 4 vs. activated carbon in 2 M NaOH exhibit the maximum specific capacitance of 125 F g −1 and 85 F g −1 respectively, at 1 A g −1 ; both having excellent cycling stability with retention of 99% capacity up to 2000 cycles. The maricite form showed 70 F g −1 with a significant drop in capacity after just 50 cycles.These results reveal that the synthesized triphylite showed a high performance energy density of 44 Wh kg −1 which is attributed to the hierarchical structure of the porous NaNiPO 4 nanosheets. At a higher temperature (>400°C) the maricite form of NaNiPO 4 possesses a nanoplate-like (coarse and blocky) structure with a large skewing at the intermediate frequency that is not tolerant of cycling. Computed results for the sodium nickel phosphate polymorphs and the electrochemical experimental results are in good agreement.

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Section: Resultsmentioning

confidence: 99%

Synthesis, structural and electrochemical properties of sodium nickel phosphate for energy storage devices

et al. 2016

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“…This change in interaction energy between M and O (or) Li also reflects in the redox voltage and specific capacity of the material (Table 1). For an interest, the above said transition metal cations were also substituted in the olivine and investigated extensively in aqueous batteries by the author's [12][13][14][15]. and Islam [21] estimated that Mn will have higher binding energy with Li than Fe.…”

Section: (B) Defects Due To Doping In M Sitementioning

confidence: 99%

Role of structural defects in olivine cathodes

Kandhasamy

Kalaiselvi

Minakshi

2012

Progress in Solid State Chemistry

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The high rate capability and structural stability of the olivine phosphates attracted a lot of interest as promising cathode materials for high energy density batteries. Alteration on these cathode materials, for instance, reducing particle size, conductive coating and metal ion doping were performed in order to improve the conductivity and to obtain high specific Li + diffusion. However, the drastic improvement in electrical conductivity for the aliovalent doping is still unclear. Rather writing a lengthy standard review, this manuscript intends to describe briefly the lattice defects owing to metal ion doping and its influence in improving the cathode performance of the olivine phosphates. This gives a new approach in this field.

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“…Aqueous rechargeable batteries may solve the safety problem associated with the currently available lithium-ion batteries and the poor cycling life associated with lead-acid and nickel-metal hydride systems. Recently, we showed [3][4] LiOH aqueous electrolyte found to be an alternate to perform the electrochemical behavior of olivine cathodes. It was reported [5] that the electrical conductivity of the olivine can be improved and is strongly dependent on the synthetic method of the materials that influences superior physical properties i.e.…”

Section: Introductionmentioning

confidence: 99%

Olivine-type cathode for rechargeable batteries: Role of chelating agents

Kandhasamy

Singh

Thurgate

et al. 2012

Electrochimica Acta

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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. AbstractOlivine (LiCo 1/3 Mn 1/3 Ni 1/3 PO 4 ) powders were synthesised at 550 -600 °C for 6 h in air by a sol-gel method using multiple chelating agents and used as a cathode material for rechargeable batteries. Range of chelating agents like a weak organic acid (Citric acid -CA), emulsifier (Triethanolamine -TEA) and non-ionic surfactant (Polyvinylpyrrolidone -PVP) in sol-gel wet chemical synthesis were used. The dependence of the physicochemical properties of the olivine powders such as particle size, morphology, structural bonding and crystallinity on the chelating agent was extensively investigated. Among the chelating agents used, unique cycling behavior (75 mAh/g after 25 cycles) is observed for the PVP assisted olivine. This is due to volumetric change in trapped organic layer for first few cycles. The trapped organic species in the electrode -electrolyte interface enhances the rate of lithium ion diffusion with better capacity retention. In contrast, CA and TEA showed a gradual capacity fade of 30 and 38 mAh/g respectively after multiple cycles. The combination of all the three mixed chelating agents showed an excellent electrochemical behavior of 100 mAh/g after multiple cycles and the synergistic effect of these agents are discussed.

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Synthesis and characterization of olivine LiNiPO4 for aqueous rechargeable battery

Cited by 127 publications

References 27 publications

Synthesis, structural and electrochemical properties of sodium nickel phosphate for energy storage devices

Synthesis, structural and electrochemical properties of sodium nickel phosphate for energy storage devices

Role of structural defects in olivine cathodes

Olivine-type cathode for rechargeable batteries: Role of chelating agents

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