Lithium intercalation into amorphous FePO4 cathode in aqueous solutions

Minakshi, Manickam

doi:10.1016/j.electacta.2010.09.011

Cited by 47 publications

(38 citation statements)

References 25 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The standard reference electrode was Hg/HgO purchased from Koslow Scientific. The cell design and its experimental procedures for the galvanostatic and slow scan cyclic voltammetric studies were made in a similar way to that described in our earlier report [15]. galvanostatically at a constant current of 0.2 mA (on mass density 8 mA/g) using an 8 channel battery analyzer from MTI Corp., USA, operated by a battery testing system (BTS).…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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

Kandhasamy

Singh

Thurgate

et al. 2012

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Electrochemical Measurementsmentioning

confidence: 99%

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

Kandhasamy

Singh

Thurgate

et al. 2012

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hg/HgO purchased from Koslow Scientific served as the standard reference electrode. The cell design and its experimental procedures for the galvanostatic and slow scan cyclic voltammetric studies were made in a similar way to that described in our earlier report [21]. galvanostatic experiments, the cell was discharged/ charged galvanostatically using an 8 channel battery analyzer from MTI Corp., USA, operated by a battery testing system (BTS).…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Polyvinylpyrrolidone assisted sol–gel route LiCo1/3Mn1/3Ni1/3PO4 composite cathode for aqueous rechargeable battery

Kandhasamy

Pandey

Minakshi

2012

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

Kandhasamy, S., Pandey, A. and Minakshi, M. (2012)Polyvinylpyrrolidone assisted sol-gel route LiCo1/3Mn1/3Ni1/3PO4 composite cathode for aqueous rechargeable battery. Electrochimica Acta, 60 (15 Jan 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. polymer assisted sol-gel (SG) methods, is reported as a cathode material for aqueous rechargeable batteries. X-ray diffraction (XRD) analysis confirms phase pure compounds in an orthorhombic structure for both these methods. However, microstructural images show polyvinylpyrrolidone (PVP) assisted SG method aids colloidal growth giving evenly distributed microparticles while SS method tend to an agglomeration during high-temperature processing.The electrochemical properties for SG are seen to be dramatically superior to those of SS. The galvanostatic analysis of the SG shows improved specific capacity over the initial cycles (45 mAh/g and 60 mAh/g for the 1 st and 20 th cycles) and stabilized upon cycling. This unique capability is due to the trapped organic products from the thermal decomposition of PVP that facilitates Li + transfer. The trapped organic coating on the cathode surface without affecting the bulk olivine is evidenced by XRD, FTIR and XPS spectroscopic techniques.

show abstract

“…The experimental procedures for the slow scan cyclic voltammetric studies were similar to those reported earlier [23]. We fabricated the LiNiPO 4 cathode for electrochemical charge-discharge test with the following procedure; a pellet was M a n u s c r i p t 6…”

Section: Introductionmentioning

confidence: 99%