公开(公告)号：US20250132103A1

公开(公告)日：2025-04-24

申请号：US18920393

申请日：2024-10-18

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KUMAUN UNIVERSITY

Inventor： Yong Chae JUNG ,  Youngnam KIM ,  Chetna TEWARI ,  Nanda Gopal SAHOO ,  Mayank PATHAK ,  Rajesh Chandra BHATT ,  Diksha BHATT

IPC: H01G11/44 ,  C01B32/198 ,  C01B32/21 ,  H01G11/86

Abstract: The method comprises separating the outer green rind the room aloe vera leaf thereby cleaning and drying in sunlight for two days followed by oven drying at 80° C. for about 24 hours; pyrolyzing the dried outer green rind in an inert environment of N2 gas at 400° C. for about 1 hour to obtain a pre-carbonized carbon (AV-C); mixing the AV-C with K2CO3 in a 2:1 impregnation ratio to obtain a mixture;; pyrolyzing the mixture of the AV-C and K2CO3 at 900° C.; removing resulting black charred residue and cleaning the resulting charred residue with double-distilled water and isopropyl alcohol; homogenizing the cleaned black material of reduced graphene oxide using an ultrasonic homogenizer at 30% power for 1 hour with 10 pulse rates thereby drying and filtering the reduced graphene oxide to obtain 3D-HPN-rGO; h) preparing an electrode using the obtained 3D-HPN-rGO; and i) constructing a supercapacitor device using the electrodes.