6.0 V High‐Voltage and Concentrated Electrolyte toward High Energy Density K‐Based Dual‐Graphite Battery

K‐based dual‐carbon batteries (K‐DCBs) integrate the advantages, including high‐voltage, low‐cost, and environmentally friendliness of dual‐ion batteries (DIBs), and large abundance of K, thus attracting much attention in large‐scale energy storage application. However, most currently used electroly...

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Published in:Advanced energy materials 2020-11, Vol.10 (41), p.n/a
Main Authors: Li, Xiang, Ou, Xuewu, Tang, Yongbing
Format: Article
Language:English
Subjects:
Batteries
concentrated electrolytes
cycling stability
dual carbon batteries
Electric potential
Electrode materials
Electrode potentials
Electrolytes
Energy storage
Flux density
Graphite
high energy density
high‐voltages
Lithium
Oxidation
Potassium
Potassium salts
Solvents
Voltage
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container_title Advanced energy materials
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creator Li, Xiang
Ou, Xuewu
Tang, Yongbing
description K‐based dual‐carbon batteries (K‐DCBs) integrate the advantages, including high‐voltage, low‐cost, and environmentally friendliness of dual‐ion batteries (DIBs), and large abundance of K, thus attracting much attention in large‐scale energy storage application. However, most currently used electrolytes based on KPF6 and carbonate solvents commonly suffer from poor oxidation potential (
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However, most currently used electrolytes based on KPF6 and carbonate solvents commonly suffer from poor oxidation potential (&lt;4.4 V vs Li/Li+) and low electrolyte concentration (&lt;1 m), which limit the cycling stability and energy density of K‐DCBs. Herein, after a matching behavior study of various electrolyte solvents with potassium salts, a concentrated electrolyte is developed by successfully dissolving 5.2 m potassium bis(fluorosulfonyl)imide into tetramethylene sulfone. This high‐concentration electrolyte exhibits advantages: 1) high oxidation potential that enhances intercalation reversibility and capacity of FSI− anions; 2) improved K+ storage at graphite anode; 3) dramatically increased energy density of K‐DCB. A proof‐of‐concept K‐ion dual‐graphite battery based on this high‐concentration electrolyte displays a discharge capacity of 83.4 mAh g−1 at 100 mA g−1, and negligible capacity fading after 300 cycles. Furthermore, considering both the electrolyte and electrode materials, energy density of such K‐DCB reaches ≈130 Wh kg−1, the best performance of K‐DCBs among previously reported research. A 5.2 m highly concentrated potassium bis(fluorosulfonyl)imide/tetramethylene sulfone electrolyte is developed for K‐based dual‐graphite batteries. Ascribed to the high oxidation potential (≈6.0 V) that allows the intercalation reversibility of FSI− anions at the graphite cathode and improved K+ storage at graphite anode, the K‐based dual‐graphite battery displays significantly enhanced capacity and energy density based on this concentrated electrolyte.</description><identifier>ISSN: 1614-6832</identifier><identifier>EISSN: 1614-6840</identifier><identifier>DOI: 10.1002/aenm.202002567</identifier><language>eng</language><publisher>Weinheim: Wiley Subscription Services, Inc</publisher><subject>Batteries ; concentrated electrolytes ; cycling stability ; dual carbon batteries ; Electric potential ; Electrode materials ; Electrode potentials ; Electrolytes ; Energy storage ; Flux density ; Graphite ; high energy density ; high‐voltages ; Lithium ; Oxidation ; Potassium ; Potassium salts ; Solvents ; Voltage</subject><ispartof>Advanced energy materials, 2020-11, Vol.10 (41), p.n/a</ispartof><rights>2020 Wiley‐VCH GmbH</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4227-6cead6e67031c99c5cc35b4cdbd6b28bd4bdb7d84ac027458da02a1c8ab21d493</citedby><cites>FETCH-LOGICAL-c4227-6cead6e67031c99c5cc35b4cdbd6b28bd4bdb7d84ac027458da02a1c8ab21d493</cites><orcidid>0000-0003-2705-4618</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail></links><search><creatorcontrib>Li, Xiang</creatorcontrib><creatorcontrib>Ou, Xuewu</creatorcontrib><creatorcontrib>Tang, Yongbing</creatorcontrib><title>6.0 V High‐Voltage and Concentrated Electrolyte toward High Energy Density K‐Based Dual‐Graphite Battery</title><title>Advanced energy materials</title><description>K‐based dual‐carbon batteries (K‐DCBs) integrate the advantages, including high‐voltage, low‐cost, and environmentally friendliness of dual‐ion batteries (DIBs), and large abundance of K, thus attracting much attention in large‐scale energy storage application. However, most currently used electrolytes based on KPF6 and carbonate solvents commonly suffer from poor oxidation potential (&lt;4.4 V vs Li/Li+) and low electrolyte concentration (&lt;1 m), which limit the cycling stability and energy density of K‐DCBs. Herein, after a matching behavior study of various electrolyte solvents with potassium salts, a concentrated electrolyte is developed by successfully dissolving 5.2 m potassium bis(fluorosulfonyl)imide into tetramethylene sulfone. This high‐concentration electrolyte exhibits advantages: 1) high oxidation potential that enhances intercalation reversibility and capacity of FSI− anions; 2) improved K+ storage at graphite anode; 3) dramatically increased energy density of K‐DCB. A proof‐of‐concept K‐ion dual‐graphite battery based on this high‐concentration electrolyte displays a discharge capacity of 83.4 mAh g−1 at 100 mA g−1, and negligible capacity fading after 300 cycles. Furthermore, considering both the electrolyte and electrode materials, energy density of such K‐DCB reaches ≈130 Wh kg−1, the best performance of K‐DCBs among previously reported research. A 5.2 m highly concentrated potassium bis(fluorosulfonyl)imide/tetramethylene sulfone electrolyte is developed for K‐based dual‐graphite batteries. Ascribed to the high oxidation potential (≈6.0 V) that allows the intercalation reversibility of FSI− anions at the graphite cathode and improved K+ storage at graphite anode, the K‐based dual‐graphite battery displays significantly enhanced capacity and energy density based on this concentrated electrolyte.</description><subject>Batteries</subject><subject>concentrated electrolytes</subject><subject>cycling stability</subject><subject>dual carbon batteries</subject><subject>Electric potential</subject><subject>Electrode materials</subject><subject>Electrode potentials</subject><subject>Electrolytes</subject><subject>Energy storage</subject><subject>Flux density</subject><subject>Graphite</subject><subject>high energy density</subject><subject>high‐voltages</subject><subject>Lithium</subject><subject>Oxidation</subject><subject>Potassium</subject><subject>Potassium salts</subject><subject>Solvents</subject><subject>Voltage</subject><issn>1614-6832</issn><issn>1614-6840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkL1OwzAUhS0EElXpymyJOcF2HCcZ-xNaRIEFulqO7bapUqfYrqpsPALPyJPgUgQjd7nnSuc7VzoAXGMUY4TIrdBmGxNEgk5ZdgZ6mGEasZyi81-dkEswcG6DwtACoyTpAcNiBBdwVq_Wn-8fi7bxYqWhMAqOWyO18VZ4rWDZaOlt23ReQ98ehFXfCCyNtqsOTrRxte_gQ8gYCReAyV404ZhasVvXARoJ77XtrsDFUjROD352H7zelS_jWTR_nt6Ph_NIUkKyiEktFNMsQwmWRSFTKZO0olJVilUkrxStVJWpnAqJSEbTXAlEBJa5qAhWtEj64OaUu7Pt2147zzft3prwkhMaCsppxnBwxSeXtK1zVi_5ztZbYTuOET_Wyo-18t9aA1CcgEPd6O4fNx-WT49_7Bf7B37p</recordid><startdate>20201101</startdate><enddate>20201101</enddate><creator>Li, Xiang</creator><creator>Ou, Xuewu</creator><creator>Tang, Yongbing</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-2705-4618</orcidid></search><sort><creationdate>20201101</creationdate><title>6.0 V High‐Voltage and Concentrated Electrolyte toward High Energy Density K‐Based Dual‐Graphite Battery</title><author>Li, Xiang ; Ou, Xuewu ; Tang, Yongbing</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4227-6cead6e67031c99c5cc35b4cdbd6b28bd4bdb7d84ac027458da02a1c8ab21d493</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Batteries</topic><topic>concentrated electrolytes</topic><topic>cycling stability</topic><topic>dual carbon batteries</topic><topic>Electric potential</topic><topic>Electrode materials</topic><topic>Electrode potentials</topic><topic>Electrolytes</topic><topic>Energy storage</topic><topic>Flux density</topic><topic>Graphite</topic><topic>high energy density</topic><topic>high‐voltages</topic><topic>Lithium</topic><topic>Oxidation</topic><topic>Potassium</topic><topic>Potassium salts</topic><topic>Solvents</topic><topic>Voltage</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Xiang</creatorcontrib><creatorcontrib>Ou, Xuewu</creatorcontrib><creatorcontrib>Tang, Yongbing</creatorcontrib><collection>CrossRef</collection><collection>Electronics &amp; Communications Abstracts</collection><collection>Mechanical &amp; Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology &amp; Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Advanced energy materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Xiang</au><au>Ou, Xuewu</au><au>Tang, Yongbing</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>6.0 V High‐Voltage and Concentrated Electrolyte toward High Energy Density K‐Based Dual‐Graphite Battery</atitle><jtitle>Advanced energy materials</jtitle><date>2020-11-01</date><risdate>2020</risdate><volume>10</volume><issue>41</issue><epage>n/a</epage><issn>1614-6832</issn><eissn>1614-6840</eissn><abstract>K‐based dual‐carbon batteries (K‐DCBs) integrate the advantages, including high‐voltage, low‐cost, and environmentally friendliness of dual‐ion batteries (DIBs), and large abundance of K, thus attracting much attention in large‐scale energy storage application. However, most currently used electrolytes based on KPF6 and carbonate solvents commonly suffer from poor oxidation potential (&lt;4.4 V vs Li/Li+) and low electrolyte concentration (&lt;1 m), which limit the cycling stability and energy density of K‐DCBs. Herein, after a matching behavior study of various electrolyte solvents with potassium salts, a concentrated electrolyte is developed by successfully dissolving 5.2 m potassium bis(fluorosulfonyl)imide into tetramethylene sulfone. This high‐concentration electrolyte exhibits advantages: 1) high oxidation potential that enhances intercalation reversibility and capacity of FSI− anions; 2) improved K+ storage at graphite anode; 3) dramatically increased energy density of K‐DCB. A proof‐of‐concept K‐ion dual‐graphite battery based on this high‐concentration electrolyte displays a discharge capacity of 83.4 mAh g−1 at 100 mA g−1, and negligible capacity fading after 300 cycles. Furthermore, considering both the electrolyte and electrode materials, energy density of such K‐DCB reaches ≈130 Wh kg−1, the best performance of K‐DCBs among previously reported research. A 5.2 m highly concentrated potassium bis(fluorosulfonyl)imide/tetramethylene sulfone electrolyte is developed for K‐based dual‐graphite batteries. Ascribed to the high oxidation potential (≈6.0 V) that allows the intercalation reversibility of FSI− anions at the graphite cathode and improved K+ storage at graphite anode, the K‐based dual‐graphite battery displays significantly enhanced capacity and energy density based on this concentrated electrolyte.</abstract><cop>Weinheim</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/aenm.202002567</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0003-2705-4618</orcidid></addata></record>
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source Wiley:Jisc Collections:Wiley Read and Publish Open Access 2024-2025 (reading list)
subjects Batteries
concentrated electrolytes
cycling stability
dual carbon batteries
Electric potential
Electrode materials
Electrode potentials
Electrolytes
Energy storage
Flux density
Graphite
high energy density
high‐voltages
Lithium
Oxidation
Potassium
Potassium salts
Solvents
Voltage
title 6.0 V High‐Voltage and Concentrated Electrolyte toward High Energy Density K‐Based Dual‐Graphite Battery
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