{"title":"Facile synthesis of nano-Si/graphite composites from rice husk for high performance lithium-ion battery anodes","authors":"Crystina Simanjuntak , Sabarmin Perangin-angin , Amru Daulay , Suci Aisyah Amaturrahim , Indah Revita Saragi , Dilshad Hussain , Arwadi Sinuraya","doi":"10.1016/j.cscee.2024.101038","DOIUrl":null,"url":null,"abstract":"<div><div>The hydrothermal method is used to attach nano-Si to the surface of natural graphite to make a high-performance nano-si/graphite (nSi/G) composite. The nSi/G composites have been successfully made from rice husk using the hydrothermal method. The characterizations used XRD, XPS, SEM, TEM, and electrochemical measurements. The results of XRD showed that nano-Si shows 2θ at 28°, 47°, 56°, 69°, and 76° is the diffraction pattern of silica and carbon, respectively. XPS spectrum at nano-Si showed a spectrum at a binding energy of 97.6 eV and 101.2 eV, indicating Si–Si and Si–OH. SEM images on nano-Si show a spherical shape; graphite contains flakes, whereas nano-Si includes every flake on the graphite. The TEM images of the nano-Si particles were around 30–50 nm in diameter and aggregated due to the high surface energy. This composite is used in lithium-ion batteries. This component structure is good for improving the ability to store Li<sup>+</sup> because the amorphous graphite layer surrounding the nano-Si has good electric conductivity and strong elasticity to help relax the strain caused by the electrochemical reaction of the Si during cycles. The specific capacity of the nSi/G composite is 3219 mAhg<sup>−1</sup>, and after 200 cycles, it still has 98.36 % of its initial capacity. The electrochemical results indicate that Si–graphite composites derived from rice husks are viable candidates for high-capacity lithium-ion battery anodes, offering significant battery performance and scalability advantages.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101038"},"PeriodicalIF":0.0000,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Chemical and Environmental Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666016424004328","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Environmental Science","Score":null,"Total":0}
引用次数: 0
Abstract
The hydrothermal method is used to attach nano-Si to the surface of natural graphite to make a high-performance nano-si/graphite (nSi/G) composite. The nSi/G composites have been successfully made from rice husk using the hydrothermal method. The characterizations used XRD, XPS, SEM, TEM, and electrochemical measurements. The results of XRD showed that nano-Si shows 2θ at 28°, 47°, 56°, 69°, and 76° is the diffraction pattern of silica and carbon, respectively. XPS spectrum at nano-Si showed a spectrum at a binding energy of 97.6 eV and 101.2 eV, indicating Si–Si and Si–OH. SEM images on nano-Si show a spherical shape; graphite contains flakes, whereas nano-Si includes every flake on the graphite. The TEM images of the nano-Si particles were around 30–50 nm in diameter and aggregated due to the high surface energy. This composite is used in lithium-ion batteries. This component structure is good for improving the ability to store Li+ because the amorphous graphite layer surrounding the nano-Si has good electric conductivity and strong elasticity to help relax the strain caused by the electrochemical reaction of the Si during cycles. The specific capacity of the nSi/G composite is 3219 mAhg−1, and after 200 cycles, it still has 98.36 % of its initial capacity. The electrochemical results indicate that Si–graphite composites derived from rice husks are viable candidates for high-capacity lithium-ion battery anodes, offering significant battery performance and scalability advantages.