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Bi-MOF-derived bismuth oxide-based negative electrode material and preparation and application thereof

A negative electrode material, bismuth oxide technology, applied in battery electrodes, electrochemical generators, hybrid capacitor electrodes, etc., to achieve the effects of improving electrochemical conversion efficiency, enhancing electrical conductivity, and shortening material transmission distance

Active Publication Date: 2022-05-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of interface layer construction method requires careful optimization of the concentration of precursors and the carbonization temperature.

Method used

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  • Bi-MOF-derived bismuth oxide-based negative electrode material and preparation and application thereof
  • Bi-MOF-derived bismuth oxide-based negative electrode material and preparation and application thereof
  • Bi-MOF-derived bismuth oxide-based negative electrode material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] 1. Preparation of CAU-17

[0087] (1) Weigh 1250mg of H 3 BTC and dissolved in 60 mL of methanol (MeOH) at room temperature;

[0088] (2) Weigh 150 mg of Bi(NO 3 ) 3 ·5H 2 O, place in a mortar and grind for 1 minute;

[0089] (3) The ground Bi(NO 3 ) 3 ·5H 2 O was added to the mixed solution of (1), and stirred at room temperature for about 10 minutes to obtain a clear solution;

[0090] (4) The clear solution obtained above was transferred to a stainless steel autoclave with 100 mL of polytetrafluoroethylene lining, and it was heated to 120° C. for 24 hours;

[0091] (5) after the reaction kettle is lowered to room temperature, the lining is taken out and the white precipitate after the reaction is collected by centrifugation, followed by washing with methanol;

[0092] (6) The obtained washed sample was vacuum-dried at 60° C. overnight and collected, to obtain CAU-17.

[0093] 2. Preparation of Bi@C

[0094] (1) The CAU-17 obtained above was placed in a por...

Embodiment 2

[0131] Compared with Example 1, in the process of preparing Bi@C in this example, the annealing temperature in an argon atmosphere was controlled to be 700 °C and the time was 1.5 h.

Embodiment 3

[0133] Compared with Example 1, in the process of preparing Bi@C in this example, the temperature of annealing in an argon atmosphere is controlled to be 900 °C, and the time is 0.5 h.

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PUM

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Abstract

The invention relates to a Bi-MOF-derived bismuth oxide-based negative electrode material and preparation and application thereof, and the negative electrode material is prepared by the following method: (1) taking CAU-17, carrying out high-temperature primary annealing under the protection of inert gas, and cooling to room temperature to obtain Bi (at) C; and (2) continuously carrying out secondary annealing on the Bi (at) C in an air atmosphere, and cooling to obtain Bi-Bi2O3 (at) C, namely the bismuth oxide-based negative electrode material. The Bi-Bi2O3 (at) C composite material disclosed by the invention has a series of advantages as a mild aqueous battery type electrode, and has enhanced structural stability, lower overpotential and higher capacity compared with a pure Bi2O3 electrode; compared with a Bi2O3 (at) C electrode, the Bi2O3 (at) C electrode has enhanced conductivity, ion diffusion kinetics and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of aqueous battery-type negative electrode materials, and relates to a Bi-MOF-derived bismuth oxide-based negative electrode material and its preparation and application. Background technique [0002] In order to meet the growing demands of new energy vehicles and portable electronic products, developing energy storage devices with high power density and energy density is one of the most promising approaches to solve the above problems. Considering the limitations of conventional rechargeable batteries in terms of low power density, researchers have begun to focus on the development of new battery-supercapacitor hybrid devices (BSHs), which typically consist of battery-type anodes and Capacitive positive electrode composition. According to the composition of the electrolyte, battery-capacitor hybrid devices can be divided into water-based devices and organic-based devices. Compared with orga...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M10/36H01G11/46H01G11/36
CPCH01M4/48H01M4/362H01M4/38H01M10/36H01G11/36H01G11/46Y02E60/13
Inventor 陈作锋徐铭泽巩帅奇牛艳丽
Owner TONGJI UNIV
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