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Flexible self-supporting tellurium nanotube composite electrode, preparation method thereof and flexible battery

A composite electrode, tellurium nanotechnology, applied in the direction of battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of reducing the overall energy density of flexible devices, limiting the flexibility of electrodes, and mutual constraints, so as to achieve easy assembly into films and improve capacity Insufficient, the effect of increasing the content

Active Publication Date: 2020-09-11
SHENZHEN HANGUANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Although the above-mentioned patents have improved the mechanical properties of the electrodes to a certain extent, due to the rigidity of the traditional powder active materials, the flexibility of the electrodes has been greatly limited. increase, and a large proportion of inactive substances such as flexible substrates, binders, and conductive agents need to be added during the preparation process, which will also reduce the overall energy density of flexible devices
As a key energy storage component of flexible devices, an ideal flexible battery must have both excellent flexibility and electrochemical performance. However, the two often restrict each other. Therefore, the design and development of electrodes with high flexibility and high performance has become a major challenge for flexible batteries. challenge

Method used

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  • Flexible self-supporting tellurium nanotube composite electrode, preparation method thereof and flexible battery
  • Flexible self-supporting tellurium nanotube composite electrode, preparation method thereof and flexible battery
  • Flexible self-supporting tellurium nanotube composite electrode, preparation method thereof and flexible battery

Examples

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Effect test

Embodiment 1

[0042] A flexible self-supporting tellurium nanotube composite electrode, the preparation method of which comprises the following four steps of S1, S2, S3 and S4:

[0043] S1, Polymer-assisted solvothermal preparation of tellurium nanotubes:

[0044] Take 0.25g Na 2 TeO 3 and 3g of PVP, dissolved in 150ml of ultrapure water and stirred for 10min, then added 50ml of acetone and continued to stir for 10min, finally added 15ml of ammonia water and 7.5ml of hydrazine hydrate and stirred for 20min. The obtained mixed solution was divided into five parts, added to five reaction kettles with polytetrafluoroethylene liners with a capacity of 50 ml, and then the reaction kettles were transferred to an oven at 180° C. for 4 hours. After the reaction solution was naturally cooled, the supernatant was poured out, and the obtained precipitate was washed with ultrapure water and centrifuged. After repeating three times, the precipitate was collected and dried in a blast drying oven at 80°...

Embodiment 2

[0053] A flexible self-supporting tellurium nanotube composite electrode, the preparation method of which comprises the following four steps of S1, S2, S3 and S4:

[0054] S1, Polymer-assisted solvothermal preparation of tellurium nanotubes:

[0055] Take 0.25g Na 2 TeO 3 and 2.5g of PVP, dissolved in 125ml of ultrapure water and stirred for 10min, then added 50ml of acetone and continued to stir for 10min, finally added 15ml of ammonia water and 7.5ml of hydrazine hydrate and stirred for 20min. The obtained mixed solution was divided into five parts, added to five reaction kettles with polytetrafluoroethylene liners with a capacity of 50 ml, and then the reaction kettles were transferred to an oven at 180° C. for 4 hours. After the reacted solution was naturally cooled, the supernatant was poured out, and the obtained precipitate was washed three times with ultrapure water, centrifuged, collected and placed in a blast drying oven at 80° C. for 8 hours to obtain tellurium na...

Embodiment 3

[0064] A flexible self-supporting tellurium nanotube composite electrode, the preparation method of which comprises the following four steps of S1, S2, S3 and S4:

[0065] S1, Polymer-assisted solvothermal preparation of tellurium nanotubes:

[0066] Take 0.25g Na 2 TeO 3 and 2g of PVP, dissolved in 50ml of ultrapure water and stirred for 10min, then added 50ml of acetone and continued to stir for 10min, finally added 7.5ml of ammonia water and 3.75ml of hydrazine hydrate and stirred for 20min. The obtained mixed solution was transferred and divided into five parts, which were added to five reaction kettles with polytetrafluoroethylene liners with a capacity of 50 ml, and then the reaction kettles were transferred to an oven at 200° C. for 3 hours. After the reaction solution was naturally cooled, the supernatant was poured out, and the obtained precipitate was washed with ultrapure water and centrifuged. After repeating three times, the precipitate was collected and dried i...

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Abstract

The invention provides a flexible self-supporting tellurium nanotube composite electrode, which comprises a flexible substrate layer and an active substance layer arranged on the flexible substrate layer. The active substance layer comprises tellurium nanotubes. The flexible self-supporting tellurium nanotube composite electrode does not need an additional current collector, a conductive agent anda binder, has the characteristics of high active substance content, light weight, good flexibility and the like, and has relatively high charge-discharge capacity and relatively good cycle stabilitywhen being used as a lithium ion battery electrode. The invention also provides the flexible self-supporting tellurium nanotube composite electrode and a flexible battery.

Description

technical field [0001] The invention relates to the field of preparation of electrode materials, in particular to a flexible self-supporting tellurium nanotube composite electrode, the invention also relates to a preparation method of the flexible self-supporting tellurium nanotube composite electrode, and the invention also relates to a flexible self-supporting tellurium nanotube composite electrode. Flexible batteries with nanotube composite electrodes. Background technique [0002] With the development of modern science and technology, electronic products are gradually developing in the direction of light, thin, wearable and foldable, and the conceptual products of flexible devices have emerged as the times require. Lithium-ion batteries have unique advantages as energy storage devices for flexible electronics due to their light weight, high specific power, high energy density, and excellent rate performance. However, when the traditional lithium-ion battery electrodes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/13H01M4/139H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/38H01M4/13H01M4/139H01M10/0525B82Y30/00B82Y40/00Y02E60/10
Inventor 廖素华李艳康建龙
Owner SHENZHEN HANGUANG TECH CO LTD
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