The secret of the magic gourd(Ⅰ):biomass from various organizations of gourds as a sustainable source for high-performance supercapacitors  

作　　者：Shaoqing Zhang Xuchun Wang Tianming Lv Baixue Dong Jiqi Zheng Yang Mu Miao Cui Ting Zhang Changgong Meng 

机构地区：[1]College of Chemistry and Materials Engineering,Anhui Science and Technology University,Bengbu 233000,China [2]Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center,Anhui Science and Technology University,Bengbu 233000,China [3]Instrumental Analysis Center,Dalian University of Technology,Dalian 116024,China [4]School of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China [5]College of Environment and Chemical Engineering,Dalian University,Dalian 116622,China [6]School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China Chemistry》2025年第3期908-923,共16页中国科学(化学英文版)

基　　金：supported by the Horizontal Project from the Dalian Wonful Pharmaceutical Co.,Ltd (881150);the Anhui Province Applied Peak Cultivation Discipline (XK-XJGF005);the Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center ([2022]547-49);the Natural Science Foundation of Anhui Province (KJ2020A0055);the National Natural Science Foundation of China (21771030)。

摘　　要：The classic cartoon“Calabash Brothers”describes a story of seven brothers born from a magic gourd uniting to defeat powerful enemies.In order to explore the secret of the magic gourd,several transition metals were used to synthesize metal silicates(CMSi)by planted gourd leaves(GLs)and then the C-MSi materials were used to fabricate supercapacitor electrodes and devices with superior electrochemical performance.By integrating theoretical calculations and experimental results,the supercapacitor electrodes and devices obtained from the combination of transition metals with amorphous carbon exhibit superior electrochemical performance.In detail,in the three-electrode system,the Na OH etched materials(C-MSi)exhibited better electrochemical performance(for instance,as for C-CdSi,607 F g^(-1)at 0.5 A g^(-1)and the capacitance retention of 98.2%after 10,000cycles)than the unetched ones(i-C-MSi).Hybrid supercapacitor(HSC)devices also achieve very excellent electrochemical properties.Take C-CdSi//AC as an example,the areal specific capacitance with 691 mF cm^(-2)at 2 mA cm^(-2),the energy density with 5.04 Whm^(-2)at the power density of 22.2 Wm^(-2)and the cycle stability with 87.3%after 6,000 cycles.This approach is very versatile and was also applied to produce many hierarchically structured metal-silicate materials of other biomass precursors,including roots,vines,flowers,fruits and seeds of the planted gourds.Thus,it is a potential way to prepare transition metal silicates using biomaterials for the enhancement of electrochemical performance and improvement of energy storage and conversion.Also,this paper preliminarily reveals the secret of the magic gourd.

关 键 词：gourd leaves alkali etching metal silicates SUPERCAPACITOR electrochemical performance 

分 类 号：TM53[电气工程—电器] O641.4[理学—物理化学]