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Volume 5, Issue 3 (Suppl)
Mod Chem Appl, an open access journal
ISSN: 2329-6798
Global Chemistry 2017
September 04-06, 2017
September 04-06, 2017 | London, UK
5
th
Global Chemistry Congress
Mod Chem Appl 2017, 5:3(Suppl)
DOI: 10.4172/2329-6798-C1-006
Cross-linked polyacrylamide filmas gel polymer electrolyte for rechargeable hybrid aqueous batteries
Zhansaya Mukanova
1
, Zhalgas Kulametov
2
, Almagul Mentbayeva
2,3
and
Zhumabay Bakenov
3
1
Nazarbayev University, Kazakhstan
2
National Laboratory Astana, Kazakhstan
3
Institute of Batteries, Kazakhstan
N
owadays, rechargeable aqueous lithium-ion batteries (RALB) are attracting an increasing interest. Main challenges faced
in conventional Li-ion batteries research are related to safety concerns associated with usage of organic electrolytes, high
productions costs as well as overall need for enhancement of physical and electrochemical properties. Replacing of flammable,
toxic and expensive organic electrolytes by aqueous has several advantages in ecological and economical point of view. Earlier
the system of lithium iron phosphate (LFP) and Zn metal which has promising results have reported [1]. But after numerous
cycles on surface of Zn metal occurs dendrites and water loses from system negatively effects on cyclability and capacity of
RALB. Therefore, it is interesting to use stable polyacrylamide gel (PAAG) instead of widely used AGM separator. Composite gel
polymer electrolytes PAAG for RALB (RALBs) have been prepared by simple ionic polymerization and cross-linking methods
and absorbing an aqueous electrolyte solution. Several compositions with different cross-linking degree were investigated. The
batteries were assembled from a cathode containing LiFePO4 – a lithium intercalation compound, a zinc metal foil anode and a
electrolyte containing Zn2+ and Li+ ions. Stability and morphology of the membranes and an electrolyte uptake and retention
properties were tested. The RALBs assembled from gel polymer electrolyte provided high specific discharge capacity, up to 140
mAh (g LiFePO4) at 0.5 C, and the cyclability of such systems was significantly enhanced compared to the RALBs assembled
with AGM and liquid electrolytes.
zhansaya.mukanova@nu.edu.kz