[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-440891-105":59,"doc-detail-440891-en":129},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":122,"head_meta":124,"extra_data":126,"updated_unix":128},105,"en","boosting-the-energy-storage-performance-with-human-hair-derived-reduced-keratin","Boosting the energy storage performance with human hair-derived reduced keratin","","Investigation evaluates human hair-derived keratin, a bio-waste material, as a capacitive element for pseudocapacitors after chemical reduction and extraction from untreated male hair. The study builds symmetric supercapacitor devices and measures impedance and current-voltage behavior using defined design parameters, including a glass fiber separator and 6 M KOH electrolyte. Results reach 800 F/g capacitance and 111.1 Wh/kg energy density without sacrificing power efficiency. NMR and EPR analyses identify carbon-based defects or radicals, linking regulated electron transfer to enhanced charge-discharge performance.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/boosting-the-energy-storage-performance-with-human-hair-derived-reduced-keratin/440891/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/boosting-the-energy-storage-performance-with-human-hair-derived-reduced-keratin/440891.png","ImageObject",300,407,{"name":92,"@type":93},"Emma Wilson","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-29",true,{"@type":101,"interactionType":102,"userInteractionCount":8},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"How was the keratin material prepared for the supercapacitor study?","Question",{"text":111,"@type":112},"Keratin was chemically reduced and extracted from untreated human male hair to obtain a high-quality capacitive material for device testing.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"What device configuration and electrolyte were used in the symmetric supercapacitor?",{"text":116,"@type":112},"A symmetric supercapacitor was fabricated with a glass fiber separator and 6 M KOH electrolyte to evaluate impedance and current-voltage behavior.",{"name":118,"@type":109,"acceptedAnswer":119},"What role did NMR and EPR spectroscopy play in explaining performance?",{"text":120,"@type":112},"NMR and EPR identified carbon-based defects or radicals and supported regulation of the electron-transfer mechanism, linking defect control to superior charge-discharge performance.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},440891,1790719024,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},3848291630094,"https://eur-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45","[www. nature.com/scientificreports](www. nature.com/scientificreports)  \nOPEN  \nBoosting the energy storage performance with human hairderived reduced keratin  \nMohamad Hasan Aleinawi1, RumeysaTutar2􀀍, Eminenur Saritas1, Duygu Senturk1, Feray Bakan-Misirlioglu3, Emre Erdem1,4 & Arpad Mihai Rostas5􀀍  \nThis investigation explores the potential use of keratin derived from human hair−a common bio-waste material−as a capacitive element that can deliver significant energy density in pseudocapacitors. The keratin was chemically reduced and extracted from untreated human male hair, producing a highquality material. This method is related to a patent application (TR 2023/002929 B). The electrical conductivity of keratin has not been thoroughly examined and remains a topic of debate. While some studies suggest high conductivity under certain conditions, others point out inherent limitations.  \nThis study addresses these discrepancies by fabricating supercapacitor devices and evaluating their impedance and current-voltage characteristics under specific design parameters. The developed symmetric supercapacitor device, featuring a glass fiber separator and 6 M KOH electrolyte, exhibited impressive capacitance (800 F/g) and energy density (111.1 Wh/kg) without compromising power efficiency. These favorable capacitance values indicate exceptional charge-discharge properties of the device. Advanced techniques, particularly NMR and EPR spectroscopies, provided significant insights that had not been reported previously. These methods enabled regulation of the electron-transfer mechanism, thereby enhancing our understanding of the relationship between material properties and device performance. NMR and EPR analyses revealed the presence of carbon-based defects or radicals, enabling precise control over defect structures and correlating them with the device’s superior performance.  \nKeywords Keratin, Supercapacitors, EPR spectroscopy, Diffusion-controlled mechanism  \nWith the increasing importance of sustainability in recent years, obtaining bioresources from biowaste and actively utilizing them in various areas, particularly in material production, has become globally significant1. Human hair is a considerable biowaste abundantly available worldwide2. Keratin, sourced from upcycled human hair biowaste, serves various purposes, including tissue engineering and microbial fuel cells3. Moreover, human hair keratin is a promising avenue for advancing green electronic devices, given the challenges of global climate change and electronic pollution. This biomaterial, abundantly sourced from nature and fully upcycled, holds significant potential in this technological race4. The sulfur-containing fibrous structural proteins found inhuman hair keratin offer distinct advantages compared to keratin sourced from other animals. These include a plentiful supply and the feasibility of using autologous proteins, making them an ideal choice for biocompatible electronic devices5,6.  \nKeratins are sulfur-containing fibrous structural proteins found in hair, wool, feathers, and nails, known for their robust physical properties. Among these sources, keratin from human hair offers distinct advantages due to its abundant supply and suitability as a realistic source of autologous proteins for biocompatible electronic devices7. Human hair keratin consists of polypeptide chains of various amino acids, which form its structural backbone through inter-and intramolecular bonds. The keratin molecules are interconnected by three types of bonds: hydrogen bonds, hydrophobic interactions, and disulfide bonds8. Hydrogen bonds, formed between hydrogen atoms and electronegative atoms, contribute to the secondary structure of keratin, like alpha-helices  \n1Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, 34956 Istanbul, Turkey. 2Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpaşa, Avcılar, 34320 Istanbul,Turkey. 3Nanotechnology Resear","cbCaifGceS62mX21","https://ap.wps.com/l/cbCaifGceS62mX21","pdf",3941760,15,"English","# Keywords and sustainability context\n# Material preparation and device fabrication\n## Symmetric supercapacitor performance\n# Electrochemical evaluation and mechanisms\n## Impedance and current-voltage characteristics\n# Spectroscopic characterization\n## NMR and EPR insights\n# Keratin structure and bonding\n# Applications and related literature","[{\"question\":\"How was the keratin material prepared for the supercapacitor study?\",\"answer\":\"Keratin was chemically reduced and extracted from untreated human male hair to obtain a high-quality capacitive material for device testing.\"},{\"question\":\"What device configuration and electrolyte were used in the symmetric supercapacitor?\",\"answer\":\"A symmetric supercapacitor was fabricated with a glass fiber separator and 6 M KOH electrolyte to evaluate impedance and current-voltage behavior.\"},{\"question\":\"What role did NMR and EPR spectroscopy play in explaining performance?\",\"answer\":\"NMR and EPR identified carbon-based defects or radicals and supported regulation of the electron-transfer mechanism, linking defect control to superior charge-discharge performance.\"}]","Boosting the energy storage performance with human hair-derived reduced keratin | PDF",1790693823,38]