Preparation method and application of electron enhanced carbon nano net
A carbon nano and electronic technology, which is applied in the field of carbon material preparation technology and energy storage, can solve the problems of low specific surface area, difficult to meet market demand, and further improvement of electronic conduction characteristics, and achieve high specific surface area and high added value. Value utilization, the effect of excellent rate performance
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Embodiment 1
[0027] Example 1: Three-dimensional electronically enhanced carbon nanonet 3DCN 800 The specific preparation process for assembly with zinc ion hybrid capacitors is as follows:
[0028] (1) Preparation of nitrogen and phosphorus dopant: first add ethylenediaminetetraacetic acid into water to make a 1mol / L solution, then weigh dipotassium hydrogen phosphate according to the ratio of ethylenediaminetetraacetic acid to 1 / 2 (K 2 HPO 4 ) into the above-mentioned solution, after the reaction is completed, filter and dry at low temperature to obtain a nitrogen-phosphorus dopant;
[0029] (2) Pretreatment of reactants: the nitrogen-phosphorus dopant obtained in step (1) is uniformly mixed with potassium hydrogen oxalate and coal tar pitch in a solid state; The mass ratio of coal tar pitch to potassium hydrogen oxalate is 1:6.
[0030] (3) The preparation method of three-dimensional electron-enhanced carbon nanomesh: transfer the reactant obtained in step (2) to the magnetic boat o...
Embodiment 2
[0033] Example 2: Three-dimensional electronically enhanced carbon nanonet 3DCN 900 The specific preparation process is as follows:
[0034] Follow the same method as steps (1)-(5) in Example 1, except that the final temperature of the activation reaction is 900°C, and the reaction is 1h;
[0035] The resulting three-dimensional electron-enhanced carbon nanonetwork is named 3DCN 900 , XPS test results show that its nitrogen content is 6.56%, phosphorus content is 4.12% 。 CNC 800 When used as the positive electrode material of zinc-ion hybrid capacitors, at 1mol / L Zn(ClO 4 ) 2 In the electrolyte, when the current density is 0.1A / g, 3DCN 900 The capacity is 357.1F / g, the energy density is as high as 158.9Wh / kg; when the current density is 20A / g, 3DCN 900 The capacity reaches 256.2F / g, the energy density is 62.3Wh / kg, and the power density is as high as 20.35kW / kg.
Embodiment 3
[0036] Example 3: Three-dimensional electronically enhanced carbon nanonet 3DCN 1000 The specific preparation process is as follows:
[0037] Carry out in the same way as steps (1)-(5) in Example 1, the difference is that the final temperature of the activation reaction is 1000°C, and the reaction is 3h;
[0038] The resulting three-dimensional electron-enhanced carbon nanonetwork is named 3DCN 1000 , its nitrogen content is 5.78%, phosphorus content is 3.56%. 3DCN 1000 When used as the positive electrode material of zinc-ion hybrid capacitors, at 1mol / L Zn(ClO 4 ) 2 In the electrolyte, when the current density is 0.1A / g, 3DCN 1000 The capacity reaches 282.5F / g, the energy density is 124.8Wh / kg; when the current density is 20A / g, 3DCN 1000 The capacity is up to 150.4F / g, and the energy density is 26.4Wh / kg.
[0039] The three-dimensional electron-enhanced carbon nanonetwork prepared in Examples 1-3 was used as a test sample, and the parameters of the pore structure and th...
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