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There are dynamic electrochemical reactions in lithium-ion batteries, which are sensitive to water and oxygen. Organic solvents, such as electrolyte, will react with lithium salt in electrolyte to generate a large amount of HF when they meet with water and oxygen, which will affect the electrochemical performance (such as capacity and cycle life).
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In 1799, Alessandro Volta, an Italian physicist, invented the first battery (vlotaic pile). He made the battery from zinc (anode) and copper (cathode) and paper (electrolyte) soaked in brine to prove that electricity can be manufactured artificially.
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In 2019, goodenough finally won the Nobel Prize in chemistry, and lithium-ion batteries will finally hold the dominant position of batteries. Today, whether it is power batteries, mobile power supplies, or flexible health care devices, lithium-ion batteries are everywhere.