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Preparation method and application of sodium-ion-embedded manganese dioxide/nitrogen-doped porous carbon composite material

A technology of nitrogen-doped porous carbon and manganese dioxide, which is applied in the manufacture of hybrid/electric double-layer capacitors and electrodes of hybrid capacitors, can solve the problems of low capacitance retention and poor rate performance, and achieve increased porosity and high porosity , the effect of uniform doping

Active Publication Date: 2018-11-30
哈尔滨杰森通用机电设备有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor rate performance and low capacitance retention when existing manganese dioxide is used as an electrode material of a pseudocapacitive supercapacitor, and to provide a manganese dioxide / nitrogen-doped porous carbon embedded with sodium ions Preparation methods and applications of composite materials

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  • Preparation method and application of sodium-ion-embedded manganese dioxide/nitrogen-doped porous carbon composite material

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specific Embodiment approach 1

[0054] Embodiment 1: This embodiment is a method for preparing a sodium ion-embedded manganese dioxide / nitrogen-doped porous carbon composite material, which is prepared according to the following steps:

[0055] 1. Preparation of dodecahedral ZIF-67:

[0056] 1. Dissolving cobalt nitrate hexahydrate in methanol to obtain cobalt nitrate solution;

[0057] The mass of cobalt nitrate hexahydrate described in step 1. and the volume ratio of methanol are (1g~2g): 40mL;

[0058] ②, dissolving 2-methylimidazole in methanol to obtain a 2-methylimidazole solution;

[0059] The mass of the 2-methylimidazole described in step 1.2 and the volume ratio of methanol are (1g~3g): 40mL;

[0060] ③. Mix cobalt nitrate solution and 2-methylimidazole solution, then stir and react at room temperature and stirring speed at 500r / min-900r / min for 15h-25h, then carry out vacuum filtration to collect solid matter; use absolute ethanol Wash the collected solid matter for 5 to 8 times, and then put t...

specific Embodiment approach 2

[0085] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of cobalt nitrate hexahydrate described in Step ① to methanol is (1.6g-2g): 40mL. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0086] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the mass of 2-methylimidazole described in step ② to methanol is (1g-2g):40mL. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and an application of a sodium-ion-embedded manganese dioxide / nitrogen-doped porous carbon composite material, relates to a preparation method and an application of a manganese dioxide composite material, and aims to solves the problems of poor rate capacity and low capacitance retention rate when manganese dioxide is used as an electrode material of apseudo-capacitor type supercapacitor. The method comprises the following steps: 1, preparing n-dodecahedron ZIF-67; 2, preparing a ZIF-67-derived nano-porous carbon material; and 3, performing compounding to obtain the sodium-ion-embedded manganese dioxide / nitrogen-doped porous carbon composite material. The sodium-ion-embedded manganese dioxide / nitrogen-doped porous carbon composite material is used as a positive electrode material of a supercapacitor. According to the method, the sodium-ion-embedded manganese dioxide / nitrogen-doped porous carbon composite material can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a manganese dioxide composite material. Background technique [0002] With the growth of global population and rapid economic development, non-renewable fossil energy is gradually decreasing. Therefore, the energy crisis has become another serious challenge faced by countries all over the world. In such an era, energy storage devices (batteries, capacitors, supercapacitors, etc.) and conversion devices (fuel cells, solar cells, etc.) have become research hotspots in major scientific research institutions. Among them, batteries such as lead-acid batteries, nickel-based batteries, sodium batteries, lithium-ion batteries, air batteries, etc. have high energy density, but their power density is low and the charging and discharging time is long, which limits their application in some specific fields. . The invention of the supercapacitor has brought dawn to our life. Supercapacitor is a new...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/44H01G11/30H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/44H01G11/46H01G11/86Y02E60/13
Inventor 武立立张喜田张慧杰
Owner 哈尔滨杰森通用机电设备有限公司
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