CN113036103A - 一种硫化钒复合碳化苦苣菜用于钾离子电池的电极材料 - Google Patents
一种硫化钒复合碳化苦苣菜用于钾离子电池的电极材料 Download PDFInfo
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- 244000113428 Sonchus oleraceus Species 0.000 title claims abstract description 29
- 235000006745 Sonchus oleraceus Nutrition 0.000 title claims abstract description 29
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001414 potassium ion Inorganic materials 0.000 title claims abstract description 22
- KSECJOPEZIAKMU-UHFFFAOYSA-N [S--].[S--].[S--].[S--].[S--].[V+5].[V+5] Chemical compound [S--].[S--].[S--].[S--].[S--].[V+5].[V+5] KSECJOPEZIAKMU-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000007772 electrode material Substances 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 4
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 4
- 238000000967 suction filtration Methods 0.000 claims abstract description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract 4
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000010405 anode material Substances 0.000 description 5
- 241000488874 Sonchus Species 0.000 description 3
- 235000008132 Sonchus arvensis ssp. uliginosus Nutrition 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- -1 transition metal sulfide Chemical class 0.000 description 2
- 229910021135 KPF6 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
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- 238000003763 carbonization Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- INPLXZPZQSLHBR-UHFFFAOYSA-N cobalt(2+);sulfide Chemical compound [S-2].[Co+2] INPLXZPZQSLHBR-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 1
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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Abstract
本发明提供一种硫化钒复合碳化苦苣菜用于钾离子电池的电极材料，将苦苣菜的冠毛研磨、过筛，用无水乙醇和去离子水多次洗涤去除其中杂质并干燥；将VO(acac)2溶解于无水乙醇和去离子水中搅拌；再加入苦苣菜冠毛粉末，超声分散后搅拌；抽滤后干燥；取苦苣菜冠毛粉末于瓷舟中在氢气氩气混合保护下加热至900℃持续2小时；加热时在进气孔放置硫粉，使其蒸发对后面的苦苣菜冠毛进行硫化，加热结束后自然冷却得到硫化钒复合碳化苦苣菜花电极材料；本发明弥补了钾离子电池的电极车了比表面积低、导电性差和离子扩散速率慢等缺点，解决了电池循环寿命差和能量密度低等问题。
Description
技术领域
本发明涉及一种用于钾离子电池的电极材料，尤其涉及一种硫化钒复合碳化苦苣菜用于 钾离子电池的电极材料。
背景技术
低成本和较高的自然丰富度使得钾离子电池(KIBs)受到越来越多科研学者的关注，KIBs 的发展起步较晚，在充放电比容量要求较低的领域，例如储能电池，KIBs有望成为替代锂离 子的新型储能装置。电极材料是钾离子电池储能中最为关键的技术，影响钠离子电容器性能 主要有电极材料、电解液成分等因素，其中阳极材料的制备是改善其性能的重要研究方向。 其中过渡金属硫化物因具有较高比容量及经济性好等优点可作为一种理想的阳极材料应用于 钾离子电池中。目前可应用的过渡金属硫化物主要有硫化锡，硫化钴以及硫化镍等材料。其 中硫化镍具有较高的比容量及热稳定性而引起了广泛关注。目前，普遍应用的传统石墨负极 无法满足人们对快充设备和高比能器件的需求。因此，开发设计具有长循环寿命的高功率阳 极和高能量阳极是新型阳极材料发展的关键方向。为了进一步提高其导电性，倍率性能以及 循环稳定性，可将其与碳材料复合，如石墨烯，碳纳米管，活性炭以及生物质碳等。其中生 物质碳材料的原材料储量大且可再生，并具有天然的层级结构，是一种经济性好且环保的碳 材料。具体可参见文献Padigi P,Thiebes J,Swan M,etal.Prussian Green:A High Rate Capacity Cathode for Potassium Ion Batteries[J].Electrochimica Acta,2015,166:32-39.以及X Wang,J Zhao,D Yao,P Xu,Y Chen,KZhu,G Wang.Bio-derived hierarchically porous heteroatoms doped -carbon asanode for high performance potassium-ion batteries.Journal ofElectoanalytical Chemistry 871(2020)114272。
发明内容
本发明的目的是提供一种硫化钒复合碳化苦苣菜花用于钾离子电池的电极材料，弥补了 钾离子电池的电极车了比表面积低、导电性差和离子扩散速率慢等缺点，解决了电池循环寿 命差和能量密度低等问题。
本发明的目的是这样实现的：
将苦苣菜的冠毛研磨、过筛，用无水乙醇和去离子水多次洗涤去除其中杂质。在80℃烘 箱中干燥12小时干燥。将2mmol VO(acac)2溶解于40ml无水乙醇和20ml去离子水中搅拌 30min。再加入0.2g苦苣菜冠毛粉末，超声分散后搅拌24h。抽滤后在60℃烘箱中干燥12h。 取0.5g苦苣菜冠毛粉末于瓷舟中在氢气氩气混合保护下以5℃/min加热至900℃持续2小时。 加热时在进气孔放置2g硫粉，使其蒸发对后面的苦苣菜冠毛进行硫化，加热结束后自然冷却 得到硫化钒复合碳化苦苣菜花电极材料。
本发明的实质是以硫化钒复合碳化苦苣菜花作为钾离子电池的阳极材料，在电池的有机 电解液中进行充放电，组装成钾离子电池装置，获得钾离子电池容量及循环寿命。
与现有技术相比，本发明的有益效果是：
本发明天然的苦苣菜冠毛具有中空管状结构，经过活化和碳化后，可制备大比表面、多 孔结构且具有三维结构的硫化钒复合碳化苦苣菜冠毛电极材料。克服了硫化钒材料导电性差、 循环稳定性差的缺点。将硫化钒复合碳化苦苣菜冠毛电极材料应用于钾离子电池中，既保持 了复合材料的高导电性和好的循环稳定性，又具有钾离子电池的高比容量特性。利用硫化钒 复合碳化苦苣菜冠毛作为钾离子电池的电极材料，不仅碳前驱体储量丰富，经济性好，而且 钾离子电池倍率性好，能量密度高，并且循环稳定性好。
具体实施方式
下面结合具体实施方式对本发明作进一步详细描述。
一种硫化钒复合碳化苦苣菜用于钾离子电池的电极材料，将苦苣菜的冠毛研磨、过筛， 用无水乙醇和去离子水多次洗涤去除其中杂质。在80℃烘箱中干燥12小时干燥。将2mmol VO(acac)2溶解于40ml无水乙醇和20ml去离子水中搅拌30min。再加入0.2g苦苣菜冠毛粉 末，超声分散后搅拌24h。抽滤后在60℃烘箱中干燥12h。取0.5g苦苣菜冠毛粉末于瓷舟中 在氢气氩气混合保护下以5℃/min加热至900℃持续2小时。加热时在进气孔放置2g硫粉， 使其蒸发对后面的苦苣菜冠毛进行硫化，加热结束后自然冷却得到硫化钒复合碳化苦苣菜花 电极材料。
以硫化钒复合碳化苦苣菜花作为工作电极，玻璃纤维素过滤膜作为隔膜，以金属钾为对 电极，以0.8M的KPF6溶液为电解质(其中，碳酸乙烯酯(EC):碳酸二乙酯(DEC)＝1︰1)， 组装成钾离子半电池，1000mA/g的高电流密度下具有180mAh/g的放电比容量，循环1000 次容量保持率为85％。
Claims (1)
1.一种硫化钒复合碳化苦苣菜用于钾离子电池的电极材料，其特征在于，由以下步骤制备而成：
将苦苣菜的冠毛研磨、过筛，用无水乙醇和去离子水多次洗涤去除其中杂质；
在80℃烘箱中干燥12小时干燥；
将2mmol VO(acac)2溶解于40ml无水乙醇和20ml去离子水中搅拌30min；
再加入0.2g苦苣菜冠毛粉末，超声分散后搅拌24h；
抽滤后在60℃烘箱中干燥12h；
取0.5g苦苣菜冠毛粉末于瓷舟中在氢气氩气混合保护下以5℃/min加热至900℃持续2小时；
加热时在进气孔放置2g硫粉，使其蒸发对后面的苦苣菜冠毛进行硫化，加热结束后自然冷却得到硫化钒复合碳化苦苣菜花电极材料。
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| CN117894970A (zh) * | 2024-03-18 | 2024-04-16 | 暨南大学 | 一种石墨烯包覆含硫空位的二硫化钒复合材料及其制备方法和应用 |
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