title: One-step fabrication of porous GaN crystal membrane and its application in energy storage.
abstract: Single-crystal gallium nitride (GaN) membranes have great potential for a variety of applications. However, fabrication of single-crystalline GaN membranes remains a challenge owing to its chemical inertness and mechanical hardness. This study prepares large-area, free-standing, and single-crystalline porous GaN membranes using a one-step high-temperature annealing technique for the first time. A promising separation model is proposed through a comprehensive study that combines thermodynamic theories analysis and experiments. Porous GaN crystal membrane is processed into supercapacitors, which exhibit stable cycling life, high-rate capability, and ultrahigh power density, to complete proof-of-concept demonstration of new energy storage application. Our results contribute to the study of GaN crystal membranes into a new stage related to the elelctrochemical energy storage application.
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Shouzhi
authors.initials: S
authors.lastname: Wang
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Shao
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Yongzhong
authors.initials: Y
authors.lastname: Wu
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Changlong
authors.initials: C
authors.lastname: Sun
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Huo
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Baoguo
authors.initials: B
authors.lastname: Zhang
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Haixiao
authors.initials: H
authors.lastname: Hu
authors.affiliation: State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, P.R. China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Hao