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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11794462 B1

PDFFull Text
Date of Patent:
Oct. 24, 2023

Filed:

Mar. 15, 2021

Rgo-pei/pvdf pyroelectric thin film and its preparation method

Applicant:

China University of Geosciences, Beijing, Beijing, CN;

Inventors:

Yihe Zhang, Beijing, CN;

Haitao Li, Beijing, CN;

Qi An, Beijing, CN;

Wangshu Tong, Beijing, CN;

Assignee:

CHINA UNIVERSITY OF GEOSCIENCES, BEIJING, Beijing, CN;

Attorney:

WPAT, PC

Primary Examiner:

John L Goff, II

Int. Cl.
CPC ...
B32B 37/00 (2006.01); G01J 5/34 (2022.01); B32B 27/30 (2006.01); B32B 9/00 (2006.01); B32B 9/04 (2006.01); H10N 15/10 (2023.01); B32B 38/18 (2006.01); B32B 37/24 (2006.01); B32B 38/16 (2006.01); B32B 38/00 (2006.01);
U.S. Cl.
CPC ...
B32B 37/025 (2013.01); B32B 9/007 (2013.01); B32B 9/045 (2013.01); B32B 27/304 (2013.01); B32B 38/18 (2013.01); G01J 5/34 (2013.01); H10N 15/15 (2023.02); B32B 38/162 (2013.01); B32B 38/164 (2013.01); B32B 2037/246 (2013.01); B32B 2255/205 (2013.01); B32B 2264/102 (2013.01); B32B 2264/108 (2013.01); B32B 2307/20 (2013.01); B32B 2311/04 (2013.01); B32B 2313/04 (2013.01); B32B 2327/12 (2013.01); B32B 2379/00 (2013.01); B32B 2457/00 (2013.01);
Abstract

The present invention belongs to the technical field of energy conversion devices, which provides an rGO-PEI/PVDF pyroelectric thin film, and the method for preparing the film, as well as a self-energized bracelet produced based on such film, which utilizes the reduced graphite oxide after modified by polyethyleneimine (PEI) (rGO-PEI) as photothermal conversion material, and the silver-plated polarized polyvinylidene fluoride (PVDF) film as pyroelectric conversion material. The rGO-PEI photothermal material is fixed to the surface of the PVDF through a transparent film, and prepare the self-energized bracelet based on it. The obtained bracelet has an output power of up to 21.3 mW/m2, and does not require additional mechanical devices to control the temperature during operation, wherein, the thermoelectric conversion, rectification, storage and application are realized through temperature fluctuation produced by absorbing sunlight during doing outdoor sports, utilizing temperature difference of air flow, and sweeping gesture, etc.

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