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四氨基钴酞菁(TaPcCo-MWCNTs)共价修饰MWCNTLi-S氧化还原催化剂
发布时间:2020-11-13     作者:wyf   分享到:

四氨基钴酞菁(TaPcCo-MWCNTs)共价修饰MWCNTLi-S氧化还原催化剂

关键词:锂硫电池,共价修饰,四氨基酞菁钴,多壁碳纳米管

开发了一种高效的Li-S氧化还原催化剂,该催化剂由被四氨基钴酞菁(TaPcCo-MWCNTs)共价修饰的MWCNT组成。有效的多硫化锂(LiPS)捕获是通过含N的硫亲硫酞菁环和耐Co中心硫原子实现的。这种吸附几何结构利用了Co未被占据的d轨道作为电子超交换高速公路。电化学测量和密度泛函理论计算揭示了LiPSs在液相中的动力学反应以及液固转变。Li 2的均匀沉积还观察到了S膜,该膜在电池循环过程中保留了阴极完整性和硫的利用率。快速的电子和锂离子通过导电的MWCNT骨架和TaPcCo上的亲硫取代基氨基快速往返于反应位点,也大大促进了催化的硫氧化还原。通过在阴极涂层中添加6 wt%的TaPcCo-MWCNT,可以实现高达7 mg cm -2的面积硫负载量,从而实现高硫利用率。在1 C下在5 mg cm -2的硫负载下实现了稳定的长期循环,初始面积容量为4.4 mAh cm -2,保留的3.5 mAh cm -2500个周期后。考虑到酞菁大分子的高结构多样性,本研究为新型Li-S催化剂提供了机会。

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锂硫电池是一种新体系二次电池,因其高比能量、环境友好等特点,引起了人们极大的关注。然而锂硫电池的发展仍面临较大的技术挑战。含硫活性物质的导电性较差,充放电过程中的反应速率较慢,正极的硫的利用率不足。此外,正极在充放电过程中产生可溶性的多硫化锂,其在正负极之间的穿梭效应导致电池库伦效率和循环稳定性的降低。

通过化学修饰的方法将导电的碳纳米管与金属酞菁类配合物以化学键合的方式结合,获得的锂硫正极催化材料显著提高了锂硫电池在高单位面积载硫量条件下的比容量、倍率性能和循环稳定性。

金属酞菁是拥有18π电子结构的金属-N4大环共轭体系,具有优异的催化性能。中心金属原子不完全占用的dz轨道为导电碳材料和多硫化物之间的电子交换提供了通道,酞菁配合物及其外围取代基包含丰富的极性基团,在催化多硫化物转化的同时可发挥较强的吸附作用。该研究团队将四氨基酞菁钴与多壁碳纳米管通过肿胺(C-NH-C)共价连接,形成了4-6nm的外围修饰层。该结构保持了多壁碳纳米管的高导电性,表面均匀分布的四氨基酞菁钴提供了丰富的亲硫活性位点(Co)和亲锂活性位点(N)。在Co-N4和外围取代基氨基(-NH2)的协同作用下,材料可以有效地吸附多硫化物并显著提高其液相和液-固转化过程的反应速率,抑制多硫化锂的穿梭效应,促进放电产物Li2S的均匀形核与生长。即使在高单位面积载硫量(7mg·cm-2)以及较大倍率下(4C),正极也能保持较好的容量和循环稳定性,电池的性能得到了显著的提高。

齐岳供应产品:

产品名称别名英文名称cas
酞菁二锂
Phthalocyanine Dilithium25510-41-2
5,10,15,20-四苯基-21H,23H-卟啉锌(II)
锌(II)TPP
四苯基卟啉锌(II)5,10,15,20-Tetraphenyl-21H,23H-porphine Zinc(II)
Zinc(II) TPP
14074-80-7
2,3,7,8,12,13,17,18-八乙基卟啉2,3,7,8,12,13,17,18-八乙基-21H,23H-卟吩2,3,7,8,12,13,17,18-Octaethylporphyrin2683-82-1
二氯酞菁锡(IV)酞菁二氯化锡(IV)Tin(IV) Phthalocyanine Dichloride18253-54-8
酞菁二钠
Disodium Phthalocyanine25476-27-1
5,10,15,20-四(2,4,6-三甲苯基)卟啉5,10,15,20-四(2,4,6-三甲苯基) -21H,23H-卟吩5,10,15,20-Tetrakis(2,4,6-trimethylphenyl)porphyrin56396-12-4
5,9,14,18,23,27,32,36-八丁氧基-2,3-萘酞菁铜(II)
铜(II)-5,9,14,18,23,27,32,36-八丁氧基-2,3-萘酞菁
5,9,14,18,23,27,32,36-Octabutoxy-2,3-naphthalocyanine Copper(II)Copper(II) 5,9,14,18,23,27,32,36-Octabutoxy-2,3-naphthalocyanine155773-67-4
四苯基卟啉氯化铁(III)5,10,15,20-四苯基-21H,23H-卟啉氯化铁(III)
5,10,15,20-Tetraphenyl-21H,23H-porphine Iron(III) Chloride
Iron(III) Tetraphenylporphyrin Chloride16456-81-8
酞菁铁(II) (升华提纯)Phthalocyanine Iron(II) (purified by sublimation)Iron(II) Phthalocyanine (purified by sublimation)132-16-1
[5-[双(4-己基苯基)氨基]-15-[2-(4-羧基苯基)乙炔基]-10,20-双(3,5-二-叔丁基苯基)卟啉]合锌(II)YD2[5-[Bis(4-hexylphenyl)amino]-15-[2-(4-carboxyphenyl)ethynyl]-10,20-bis(3,5-di-tert-butylphenyl)porphyrinato]zinc(II)1201915-91-4
酞菁锡(II)Phthalocyanine Tin(II)Tin(II) Phthalocyanine15304-57-1
酞菁镁(II)Phthalocyanine Magnesium(II)Magnesium(II) Phthalocyanine1661-03-6
5,10,15,20-四(2,6-二氯苯基)卟吩5,10,15,20-四(2,6-二氯苯基)卟啉5,10,15,20-Tetrakis(2,6-dichlorophenyl)porphyrin37083-37-7
2,3,7,8,12,13,17,18-八氟-5 ,10,15,20-四(五氟苯基)卟啉全氟-5,10,15,20-四苯基-21H,23H-卟啉2,3,7,8,12,13,17,18-Octafluoro-5,10,15,20-tetrakis(pentafluorophenyl)porphyrin121399-88-0
酞氰化锌 (升华提纯)酞菁锌Zinc Phthalocyanine (purified by sublimation)14320-04-8
5,15-二苯基卟啉5,15-二苯基-21H,23H-卟吩5,15-Diphenylporphyrin22112-89-6
酞菁铅(II)Phthalocyanine Lead(II)Lead(II) Phthalocyanine15187-16-3
酞菁钴(II) (升华提纯)
Cobalt(II) Phthalocyanine (purified by sublimation)3317-67-7
2,3,9,10,16,17,23,24-八氟酞菁铜(II) (升华纯化)2,3,9,10,16,17,23,24-Octafluorophthalocyanine Copper(II) (purified by sublimation)
F8CuPc (purified by sublimation)
Copper(II) 2,3,9,10,16,17,23,24-Octafluorophthalocyanine (purified by sublimation)148651-60-9
2,9,16,23-四叔丁基酞菁铜(II)4,4',4',4'-四叔丁基酞菁铜Copper(II) 2,9,16,23-Tetra-tert-butylphthalocyanine39001-64-4
四苯基卟啉钴(II)5,10,15,20-四苯基-21H,23H-卟吩钴(II)
TPP钴(II)
Cobalt(II) Tetraphenylporphyrin14172-90-8
四苯基卟啉铜(II)5,10,15,20-四苯基-21H,23H-卟啉铜(II)
铜(II)TPP
Copper(II) Tetraphenylporphyrin14172-91-9
酞菁氯化铝铝酞菁Phthalocyanine Chloroaluminum14154-42-8
1,2,3,4,8,9,10,11,15,16,17,18,22,23,24,25-十六氟酞菁铜(II) (升华提纯)F16CuPc (purified by sublimation)1,2,3,4,8,9,10,11,15,16,17,18,22,23,24,25-Hexadecafluorophthalocyanine Copper(II) (purified by sublimation)14916-87-1
酞菁蓝酞菁铜(II),90%(β型)Phthalocyanine Blue147-14-8
颜料蓝16 (升华提纯)Pigment Blue 16 (purified by sublimation)Phthalocyanine (purified by sublimation)574-93-6
5,10,15,20-四(4-羧基甲氧苯基)-卟啉5,10,15,20-四(4-羧基甲氧苯基)-21H,23H-卟吩5,10,15,20-Tetrakis(4-carboxymethyloxyphenyl)porphyrin127812-08-2
5,10,15,20-四(对甲苯基)卟啉5,10,15,20-四(4-甲苯基)卟啉5,10,15,20-Tetrakis(p-tolyl)porphyrin14527-51-6
5,10,15,20-四(4-羟苯基)卟啉5,10,15,20-四(4-羟苯基)-21H,23H-卟吩5,10,15,20-Tetrakis(4-hydroxyphenyl)porphyrin51094-17-8
5,10,15,20-四(3,5-二甲氧苯基)卟啉5,10,15,20-四(3,5-二甲氧苯基)-21H,23H-卟吩5,10,15,20-Tetrakis(3,5-dimethoxyphenyl)porphyrin74684-34-7
内消旋-四苯基卟吩
meso-Tetraphenylchlorin2669-65-0
meso-四(4-羧基苯基)卟吩四甲酯5,10,15,20-四(4-甲氧羰基苯基)卟啉5,10,15,20-Tetrakis(4-methoxycarbonylphenyl)porphyrin22112-83-0
5,10,15,20-四(4-氨基苯基)卟啉5,10,15,20-四(4-氨基苯基)-21H,23H-卟吩5,10,15,20-Tetrakis(4-aminophenyl)porphyrin22112-84-1
5-(4-羧苯基)-10,15,2-三苯基卟啉5-(4-羧苯基)-10,15,2-三苯基-21H,23H-卟吩5-(4-Carboxyphenyl)-10,15,20-triphenylporphyrin95051-10-8
5,10,15,20-四(五氟苯基)卟啉5,10,15,20-四(五氟苯基)-21H,23H-卟吩5,10,15,20-Tetrakis(pentafluorophenyl)porphyrin25440-14-6
5,10,5,20-四(3,5-二羟苯基)卟啉5,10,5,20-四(3,5-二羟苯基) -21H,23H-卟吩5,10,15,20-Tetrakis(3,5-dihydroxyphenyl)porphyrin145764-54-1
酞菁绿G颜料绿 7Pigment Green 71328-53-6
5,15-双(苯乙炔基)-10,20-双[(三异丙基硅烷基)乙炔基]卟吩]]合镁(II)
[5,15-Bis(phenylethynyl)-10,20-bis[(triisopropylsilyl)ethynyl]porphyrinato]magnesium(II)1397288-30-0
锡(IV) 2,3-二氯化萘酞菁二氯(2,3-萘酞氰基)锡(IV)Tin(IV) 2,3-Naphthalocyanine Dichloride26857-61-4
5,10,15,20-四(4-甲氧苯基)-21H,23H-卟吩5,10,15,20-四(4-甲氧苯基)卟啉5,10,15,20-Tetrakis(4-methoxyphenyl)porphyrin22112-78-3
氧钛酞菁 (升华提纯)酞菁氧钛/氧化(酞菁)钛Titanyl Phthalocyanine (purified by sublimation)26201-32-1
四苯基卟吩Tetraphenylporphine (Chlorin free)
TPP (Chlorin free)
Tetraphenylporphyrin (Chlorin free)917-23-7
5-(4-甲氧羰基苯基)-10,15,2-三苯基卟吩5-(4-Carbomethoxyphenyl)-10,15,20-triphenylporphyrin5-(4-Methoxycarbonylphenyl)-10,15,20-triphenylporphyrin119730-06-2
[5,10,15,20-四(4-甲氧苯基)卟啉]合钴(II)[5,10,15,20-四(4-甲氧苯基)-21H,23H-卟吩]合钴(II)
卟啉钴
[5,10,15,20-Tetrakis(4-methoxyphenyl)porphyrinato]cobalt(II)28903-71-1
5,10,15,20-四(4-吡啶基)卟啉5,10,15,20-四(4-吡啶基)-21H,23H-卟啉5,10,15,20-Tetra(4-pyridyl)porphyrin16834-13-2
四(4-羧苯基)卟吩TCPP [=四(4-羧苯基)卟吩] [铜和镉用超高灵敏分光光度试剂][用于以HPLC进行的金属同时测定]Tetrakis(4-carboxyphenyl)porphyrin14609-54-2
5,10,15,20-四(4-磺苯基)卟啉
四苯基卟啉四磺酸
TPPS (=四苯基卟啉四磺酸水合物)5,10,15,20-Tetrakis(4-sulfophenyl)porphyrin
Tetraphenylporphyrin Tetrasulfonic Acid
35218-75-8
二氰基吡嗪类&类似物 [酞菁砌块]

2-氨基-4,5-二氰基-1H-咪唑2-氨基-4,5-咪唑二甲腈2-Amino-4,5-dicyano-1H-imidazole40953-34-2
1,4,5,6-四氢-5,6-二氧-2,3-二氰基吡嗪1,4,5,6-四氢-5,6-二氧-2,3-吡嗪二甲腈1,4,5,6-Tetrahydro-5,6-dioxo-2,3-pyrazinedicarbonitrile36023-64-0
5,6-二氨基-2,3-二氰基吡嗪2,3-二氰基-5,6-二氨基吡嗪5,6-Diamino-2,3-dicyanopyrazine36023-58-2
2,3-二氰基-5-甲基吡嗪5-Methyl-2,3-pyrazinedicarbonitrile2,3-Dicyano-5-methylpyrazine52197-12-3
吡啶-2,3-二甲腈2,3-二氰基吡啶Pyridine-2,3-dicarbonitrile17132-78-4
2,3-二氰基吡嗪吡嗪-2,3-二甲腈2,3-Dicyanopyrazine13481-25-9
4,5-二氰基咪唑DCI/4,5-二氰咪唑4,5-Dicyanoimidazole1122-28-7
5,6-二氯-2,3-二氰基吡嗪5,6-Dichloro-2,3-pyrazinedicarbonitrile5,6-Dichloro-2,3-dicyanopyrazine56413-95-7
2,3-二氰基-5-氨基-6-氯吡嗪5-氨基-6-氯-2,3-二氰基吡嗪5-Amino-6-chloro-2,3-dicyanopyrazine56413-96-8
邻苯二甲腈类 [酞菁砌块]

4-硝基邻苯二甲腈1,2-二氰基-4-硝基苯4-Nitrophthalonitrile31643-49-9
1,3-二亚氨基异吲哚啉
1,3-Diiminoisoindoline57500-34-2
4-碘酞腈1,2-二氰基-4-碘苯4-Iodophthalonitrile69518-17-8
3-硝基邻苯二甲腈1,2-二氰基-3-硝基苯3-Nitrophthalonitrile51762-67-5
4-(4-α-异丙苯基苯氧基)苯二甲腈2-[4-(3,4-Dicyanophenoxy)phenyl]-2-phenylpropane4-(4-α-Cumylphenoxy)phthalonitrile83482-57-9
4-戊氧基苯二甲腈4-戊氧基邻苯二甲腈4-Pentyloxyphthalonitrile106943-83-3
4-溴邻苯二甲腈4-溴-1,2-二氰基苯4-Bromophthalonitrile70484-01-4
4-正丁氧基-1,2-二氰苯4-丁氧基邻苯二甲腈4-Butoxyphthalonitrile81560-32-9
4-己氧基苯二甲腈1,2-Dicyano-4-hexyloxybenzene4-Hexyloxyphthalonitrile104949-82-8
4-丙氧基邻苯二甲腈4-丙氧基苯二甲腈4-Propoxyphthalonitrile106144-18-7
4-氨基邻苯二甲腈3,4-二氰基苯胺4-Aminophthalonitrile56765-79-8
1,2-二氰基-4-氟苯4-氟邻苯二腈4-Fluorophthalonitrile65610-14-2
4,5-二氟酞腈1,2-二氰基-4,5-二氟苯4,5-Difluorophthalonitrile134450-56-9
4,5-二氨基酞腈1,2-二氨基-4,5-二氰基苯4,5-Diaminophthalonitrile129365-93-1
4-(2',6'-二甲基苯氧基)邻苯二甲腈1,2-二氰基-4-(2',6'-二甲基苯氧基)苯4-(2',6'-Dimethylphenoxy)phthalonitrile221302-75-6
4,5-二氯邻苯二甲腈1,2-二氯-4,5-二氰基苯4,5-Dichlorophthalonitrile139152-08-2
邻苯二甲腈1,2-二氰基苯Phthalonitrile91-15-6
全氯邻苯二甲腈四氯邻苯二甲腈Tetrachlorophthalonitrile1953-99-7
4-叔丁基邻苯二甲腈4-叔丁基-1,2-二氰基苯4-tert-Butylphthalonitrile32703-80-3
四氟邻苯二甲腈3,4,5,6-四氟邻苯二甲腈Tetrafluorophthalonitrile1835-65-0
4-羟基邻苯二甲腈3,4-二氰基苯酚4-Hydroxyphthalonitrile30757-50-7
1,2-Dicyano-4-dodecyloxybenzene4-十二烷氧基邻苯二甲腈4-Dodecyloxyphthalonitrile161082-75-3
1,2,4,5-四氰基苯1,2,4,5-苯四甲腈1,2,4,5-Tetracyanobenzene712-74-3
2,3-二氰基对苯二酚3,6-二羟基邻苯二甲腈
2,3-二氰基羟基醌
3,6-二羟基邻苯二腈
3,6-二羟基邻苯二甲氰
2,3-二氰基氢醌
2,3-Dicyanohydroquinone4733-50-0
萘二甲腈类 [酞菁砌块]

1,2-萘二甲腈1,2-二氰基萘1,2-Naphthalenedicarbonitrile19291-76-0
1,3-二亚氨基苯并[f]异吲哚啉
1,3-Diiminobenz[f]isoindoline65558-69-2
2,3-二氰基-6-硝基萘
2,3-Dicyano-6-nitronaphthalene184026-06-0
2,3-二溴-6,7-二氰基萘6,7-Dibromonaphthalene-2,3-dicarbonitrile2,3-Dibromo-6,7-dicyanonaphthalene74815-81-9
2,3-二氰基-1,4-二羟基-5-硝基萘2,3-二氰基-5-硝基-1,4-萘二醇2,3-Dicyano-1,4-dihydroxy-5-nitronaphthalene4655-62-3
6-溴-2,3-二氰基萘6-溴萘-2,3-二甲腈6-Bromo-2,3-dicyanonaphthalene70484-02-5
2,3-二氰基萘2,3-萘二甲腈2,3-Dicyanonaphthalene22856-30-0

小编:wyf  11.13

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