A kind of crystalline water battery and its preparation method
A water battery and crystallization technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve the problems of high price and limited source of positive electrode active materials, achieve convenient storage, avoid pollution, and have good industrialization prospects Effect
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Embodiment 1
[0021] Positive electrode: using aluminum sulfate octadecahydrate (analytical grade) as the positive electrode active material, acetylene black as a conductive agent, and polyvinylidene fluoride powder as a binder, mix 0.08 g of aluminum sulfate octadecahydrate, 0.01 g of acetylene black, 0.01 g of polyvinylidene fluoride as a binder. The tetrafluoroethylene was placed in a mortar and mixed with anhydrous ethanol and ground evenly, the obtained paste mixture was coated on a nickel mesh, compacted with a press, dried and used as a battery positive electrode;
[0022] Negative electrode: a lithium sheet with a size of 5mm×5mm is used as the negative electrode;
[0023] Diaphragm: PP-PE composite microporous membrane is used as battery separator;
[0024] Assembly of the battery: lay the positive electrode cover flat, place the spring sheet, the stainless steel sheet, and then place the above-prepared positive electrode sheet, and inject the molar concentration of 1 molL with a p...
Embodiment 2
[0032] Using gel polymer electrolyte membrane (referring to the separator prepared with gel polymer electrolyte), water-based binder and solvent, other operations are the same as in Example 1
[0033]Positive electrode: using sodium carbonate decahydrate (analytical grade) as the positive electrode active material, acetylene black as the conductive agent, styrene-butadiene rubber latex as the binder, sodium carboxymethyl cellulose dissolved in deionized water as the solvent, 0.08 g of decahydrate Sodium carbonate, 0.01 g of acetylene black, and 0.01 g of styrene-butadiene rubber were placed in a mortar, 1 ml of 2wt% sodium carboxymethyl cellulose aqueous solution was added as a solvent, and the mixture was repeatedly stirred and ground for 2 hours; Put it on aluminum foil, blow dry in a 50°C oven, vacuum dry at 65°C for 12 hours, compact it into a tight sheet on a press, and cut it into a pole piece with a size of 5mm×5mm, which is used as a positive electrode piece for the bat...
Embodiment 3
[0039] All solid-state electrolyte Mg-PSZ ceramics were used as solid-state membrane, magnesium sulfate heptahydrate was used as positive electrode active material, and magnesium flakes were used as negative electrode active material, and other operations were the same as in Example 1.
[0040] The electrochemical performance of the assembled crystal water battery was tested, the voltage was 2.1V ~ 2.5V, and the first discharge capacity reached 102mAhg -1 .
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