Multi-component Olivine for Lithium-Ion Hybrid Capacitor

Manickam Minakshi, Shanmughasundaram Duraisamy, Penki Rao Tirupathi, Sathiyaraj Kandhasamy, Munichandraiah Nookala

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10 Citations (Scopus)


A lithium-ion hybrid capacitor comprising of a battery type multi-component olivine (LiMn1/3Co1/3Ni1/3PO4) cathode and a capacitive type carbon negative electrode is reported. Olivine phosphate synthesized with chelating agent's polyvinylpyrrolidone (PVP) or triethanolamine (TEA) showed uniform carbon coating through in-situ process exhibiting a surface area 5.1 m2/g with porosity 0.02 cm2/g. The surface area for commercial carbon electrode was observed to be 1450 m2/g with high porosity 0.76 cm2/g. Galvanostatic charge/discharge cycling tests were conducted in the coin cells, olivine vs. Li, offering a cell voltage of 4.75 V vs. Li with a maximum specific capacitance of 125 F/g. In the case of olivine vs. carbon in a lithium-ion hybrid device delivered a high discharge capacitance of 86 F/g at a specific current of 0.12 A/g with a cycling retention of 53 F/g (38% loss) after 250 cycles. The obtained performance of PVP synthesized olivine material is manifested to uniform carbon coating and the trapped organic products that provide pathways for facile electrochemical reactions than their TEA counterparts.
Original languageEnglish
Pages (from-to)5974-5992
JournalInternational Journal of Electrochemical Science
Issue number11
Publication statusPublished (in print/issue) - Nov 2014


  • Olivine
  • Lithium-ion
  • Hybrid
  • Capacitor
  • Polymer
  • Carbon
  • Porosity


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