Polymer Crust Electrolyte Based On Starch-Chitosan Blend Mixed With KI by Gelation Method

JASEM Front Page
The usage of biopolymer materials in the polymer crust electrolyte system helps to abolish environmental crisis, which will unswervingly carry towards green nation with good ionic conductivity. Biodegradable polymer crust electrolyte based on starch chitosan blends mixed with potassium iodide has been developed through gelation method. This work has the details of conductivity, dielectric, dielectric loss tangent, and modulus measurements. The decrease in diameter of the semicircle in Nyquist plots proved the increase in conductivity of polymer crust. Impedance analysis shows that the entire sample has gel like conductivity. The room temperature conductivity of electrolyte of 4.6544 x 10-4 was enhanced to 1.5405 x 10-2 S/cm on addition of 6 weight percentages of potassium iodide, affirming the increase in the number of charge carriers. The value of dielectric constant was low in higher frequency side and high at low frequency side. The height of the hump decreased from the addition of 1 to 6 weight percentages of KI. The long range motion of mobile charge carrier and conduction in material are indicated by the peak shift towards high frequency end. The long tail obtained in the modulus plot depicts the crust as an ionic conductor.

Keywords: Gel polymer electrolyte, Starch-chitosan blend, Potassium iodide, Conductivity, Conduction mechanism


  1. R. Singh, N.A. Jadhav, S. Majumder, B. Bhattacharya and P.K. Singh, Novel biopolymer gel electrolyte for dye-sensitized solar cell application, Carbohyd. Polym, 91, 2013, 682-690.
  2. Y.S. Zhu, X.J. Wang, Y.Y. Hou, X.W. Gao, L.L. Liu, Y.P. Wu, and M. Shimizu, A novel gel polymer electrolyte based on poly ionicliquid1-ethyl 3-(2-methacryloyloxy ethyl) imidazolium iodide, European Polymer Journal, 43, 2007, 2699–2707.
  3. Kamlesh Kumari and Usha Rani, Controlled Release of Metformin hydrochloride through crosslinked blends of chitosan-starch, Advances in Applied Science Research, 2 (2), 2011,48-54.
  4. Thawien Bourtoom, Manjeet S. Chinnan, Preparation and properties of rice starch chitosan blend biodegradable film, LWT - Food Science and Technology, 41, 2008, 1633-1641.
  5. Tanmaya Badabanda,Ranjankumar and Harichandan, , Frequency and temperature dependence behaviour of impedance, modulus and conductivity of BaBi4Ti4O15 Aurivillius ceramic, Processing and Application of Ceramics, 8, 2014, 145-153.
  6. M.F Shukur, and M.F.Z.Kadir, Electrical and transport properties of NH4Br-doped cornstarch-based solid biopolymer electrolyte, Ionics 12, 2014, 224-238.
  7. Y.N. Sudhakar, and M. Selvakumar, Lithium perchlorate doped plasticized chitosan and starch blend as biodegradable polymer electrolyte for super capacitors, Electrochimica Acta, 78, 2012, 398-405.
  8. Jae-Kwang Kim, Cho-Rong Shin, Jou-Hyeon Ahn, Aleksandar Matic, and Per Jacobsson, Highly porous LiMnPO4 in combination with an ionic liquid-based polymer gelelectrolyte for lithium batteries, Electrochemistry Communications, 13, 2011, 1105–1108.
  9. M.F. Shukur and , M.F.Z. Kadir, , Hydrogen ion conducting starch-chitosan blend based electrolyte for application in electrochemical devices, Electrochimica Acta, 158, 2015, 152-165.
  10. S.R. Majid, and A.K. Arof, Proton-conducting polymer electrolyte films based on chitosan acetate complexed with NH4NO3 salt, Physica B, 355, 2005, 78–82.
  11. A. S. Ahmad Khiar & A. K. Arof, Conductivity studies of starch-based polymer electrolytes, Ionics, 16, 2010,123–129.
  12. Z. Osman, Z.A. Ibrahim, and A.K. Arof, Conductivity enhancement due to ion dissociation in plasticized chitosan based polymer electrolytes, Carbohydrate Polymers, 44, 2001, 167–173.
  13. Mewada R. K., Nimish Shah and Mehta Tejal., Synthesis of covalently crosslinked chitosan-starch copolymers through reactive blending for oral drug delivery, Journal of Environmental Research And Development, 9, 2015, 1133-1137.
  14. Jeremy, C. H. Koh, Zainal Arifin Ahmad,Ahmad and Azmin Mohamad, Bacto agar-based gel polymer electrolyte, Ionics, 18,2012, 359–364.
  15. J. F. Du, Y. Bai, W. Y. Chu, and L. J. Qiao, The Structure and Electric Characters of Proton-Conducting Chitosan Membranes with Various Ammonium Salts as Complexant, Journal of Polymer Science: Part B: Polymer Physics, 48, 2010, 880–885.
  16. A. K. Arof, S. Amirudin, S. Z. Yusof and I. M. Noor, A method based on impedance spectroscopy to determine transport properties of polymer electrolytes, Phys. Chem. Chem. Phys, 16, 2014, 1856-1867.
  17. N. H. Idris H. B. Senin and A. K. Arof, Dielectric spectra of LiTFSI-doped chitosan/PEO blends, Ionics, 13, 2007, 213–217.
  18. J. Einfeldt, D. Meibner, and A. Kwasniewski, Contributions to the molecular origin of the dielectric relaxation processes in polysaccharides – the high temperature range, Journal of Non-Crystalline Solids, 320, 2003, 40–55.
  19. Rahul Singh, Jaya Baghel, S. Shukla, and B. Bhattacharya, Hee-Woo Rhee and Pramod K. Singh, Detailed electrical measurements on sago starch biopolymer solid electrolyte, Phase Transitions, 2014, 1-9
  20. M. F. Shukur, R. Ithnin, and M. F. Z. Kadir, Electrical properties of proton conducting solid biopolymer electrolytes based on starch– chitosan blend, Ionics, 20, 2014, 977–999
  21. A.S.A. Khiar, R. Puteh, and A.K. Arof , Conductivity studies of a chitosan-based polymer electrolyte Physica B, 373, 2006, 23–27
  22. Sit Y.K., Samsudin A.S. and Isa M.I.N, Ionic Conductivity Study on Hydroxyethyl Cellulose (HEC) doped with NH4Br Based Biopolymer Electrolytes, Research Journal of Recent Sciences, 1[11], 2012, 16-21.