Preparation method of super-capacitor electrode material
A technology of supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of low energy density, poor cycle performance and power density, and achieve the effects of excellent rate performance, easy large-scale application, and simple and effective methods.
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Embodiment 1
[0018] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;
[0019] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;
[0020] 3) Add the solution described in step 2) dropwise to the solution described in step 1);
[0021] 4) Put the solution described in step 3) into the reactor, and react at 120°C for 12 hours;
[0022] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;
[0023] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.
[0024] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1127 F g -1 , after 3000 cycles, the capacity retention rate is 91%.
Embodiment 2
[0026] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;
[0027] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;
[0028] 3) Add the solution described in step 2) dropwise to the solution described in step 1);
[0029] 4) Put the solution described in step 3) into the reactor, and react at 100°C for 24 hours;
[0030] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;
[0031] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.
[0032] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1125 F g -1 , after 3000 cycles, the capacity retention rate is 90%.
Embodiment 3
[0034] 1) Dissolve 0.166g terephthalic acid in 5 ml DMF;
[0035] 2) Dissolve 0.3565g nickel chloride hexahydrate in 10 ml H 2 O middle;
[0036] 3) Add the solution described in step 2) to the solution described in step 1 dropwise;
[0037] 4) Put the solution described in step 3) into the reactor, and react at 130°C for 4 hours;
[0038] 5) The product obtained in step 4) was washed three times with water and ethanol respectively, and dried at 70°C for 24 hours to obtain a sample;
[0039] 6) This nickel-based metal-organic framework is made into a supercapacitor electrode.
[0040] The maximum specific capacity of the nickel-based metal-organic framework electrode prepared in this example can reach 1126 F g -1 , after 3000 cycles, the capacity retention rate is 90.3%.
[0041] figure 1 The charge-discharge curves of Ni-MOF electrodes at different current densities. From figure 1 It can be calculated that the Ni-MOF electrode is at 0.5 A·g -1 , the specific capacity...
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