Engineers from the University of Maryland and Brookhaven National Laboratory have developed an electrolyte structure that provides record-breaking efficiency for zinc batteries. This was reported by Ixbt.com.
A research team led by Professor Chunsheng Wang and Dr. Dejian Duan has found a solution to a fundamental problem with zinc batteries. Previously, such power cells suffered from short lifespans due to the decomposition of water molecules and the growth of zinc dendrites.
The scientists created low-concentration aqueous electrolytes that do not lag behind expensive and viscous compositions, while maintaining high conductivity and low cost.
The researchers used fluorinated anions and salts with a donor number higher than 18. This allowed the negatively charged ions to form a unique molecular structure that binds not only with zinc ions but also with surrounding water molecules.
During laboratory experiments, the new batteries demonstrated a coulombic efficiency of 99.99 percent over more than 1,000 operating cycles at an energy density of up to 130 Wh/kg.
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