Method for improving electrode capacity by in-situ reduction cladding of metal
A coating and metal technology, applied in the field of electrochemistry, to achieve the effect of increasing capacity, enhancing conductivity and cycle performance, and being simple and easy to operate
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Embodiment 1
[0014] a. Mechanically mix 1g of powdered lithium titanate with 0.05g of acetylene black and ball mill for 2 hours, and then press into tablets, wherein the thickness of the tablets is 0.01cm;
[0015] b. Use the sheet pressed in step a as the positive electrode material, use metal lithium as the negative electrode, and use 1mol / L lithium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a lithium ion battery, and discharge it to 1.5V;
[0016] c Disassemble the battery discharged to 1.5V in step b, take out 1g of the electrode material prepared in step b, disperse it in 10g of 0.01mol / L soluble titanium salt solution, soak it for 1h, and then take it out at 60°C Drying under low temperature, the in-situ reduction-coated titanium electrode material was obtained.
Embodiment 2
[0018] a Mechanically mix 1g of powdered sulfur with 0.125g of acetylene black and ball mill for 20h, then press into tablets, wherein the thickness of the tablets is 0.5cm;
[0019] b Use the sheet pressed in step a as the positive electrode material, use sodium metal as the negative electrode, and use 1mol / L sodium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a sodium ion battery, and discharge it to 0.001V;
[0020] c Disassemble the battery discharged to 0.001V in step b, take out 1g of the electrode material prepared in step b, disperse and soak it in 100g of soluble manganese salt solution of saturated concentration for 24h, and then take it out at 120°C After drying, the in-situ reduction-coated manganese electrode material is obtained.
Embodiment 3
[0022] a Mechanically mix 1g of powdered selenium with 0.1g of acetylene black and ball mill for 10h, then press into tablets, wherein the thickness of the tablets is 0.1cm;
[0023] b. Use the sheet pressed in step a as the positive electrode material, use metallic lithium as the negative electrode, and use 1mol / L lithium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a lithium ion battery, and discharge it to 0.01V;
[0024] c Disassemble the battery discharged to 0.01V after step b, take out 1g of the electrode material prepared in step b, disperse it in 50g of 0.01mol / L soluble nickel salt solution, soak it for 12h, and then take it out at 80°C Drying under low temperature, the in situ reduction coated nickel electrode material was obtained.
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Abstract
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