Study on the effect of transition metal sulfide in lithium–sulfur battery

Zhang, Kailong; Chen, Feifei; Pan, Honglin; Wang, Li; Wang, Di; Jiang, Yu; Qian, Yitai

doi:10.1039/c8qi01193a

Cited by 55 publications

(20 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consequently, it is considered that Fe 1− x S should be an ideal electrocatalyst for LSBs due to the high LiPs adsorption abilities associated with metal sulfides, and its high electrical conductivity, which would facilitate electronic transport and consequently promote the conversion of soluble LiPs into solid Li 2 S 2 /Li 2 S. Nevertheless, Fe 1− x S pyrrhotite has seldom been investigated as electrocatalyst in sulfur cathode for LSBs. [ 41,42 ] Porous carbon spheres as nanoreactors are currently gaining popularity in energy applications. [ 43 ] A nanoreactor is a standalone nanosized confined space that has been engineered with high surface area and pore volume, high number of active sites for a particular reaction and reduced mass transfer limitations for free transport of reactants and products.…”

Section: Introductionmentioning

confidence: 99%

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

117

View full text Add to dashboard Cite

of 2600 Wh kg −1 and are recognized as one of high energy density storage devices for practical applications. In LSBs the cathode material is mainly sulfur, which is abundantly available, low cost, environmentally friendly and has high theoretical capacity of 1675 mAh g −1 . [1][2][3][4][5][6] However, the challenging issues associated with sulfur-based cathodes are: 1) the low electrical conductivity of sulfur, 2) the dissolution and shuttling effects of lithium polysulfides (LiPs), and 3) large volume variations during charge/discharge cycles. These bring about low efficiency, poor cycling stability, self-discharge phenomena, and ultimately degradation of the electrode material, all of which currently limit the potential commercialization of LSBs. These drawbacks, especially the difficulty to confine LiPs are the current research priorities in the field of LSBs. [1,7,8] To overcome these problems, a vast amount of research has been carried out in the last decade. The encapsulation of sulfur in a conductive carbon host can effectively improve the electrical conductivity of sulfur. Moreover, carbon offers a physical barrier that encapsulates the LiP intermediates. [9][10][11][12] Nevertheless, such weak physical confinement is not enough to suppress the eventual diffusion of LiPs over time. [13] Due to the polar nature of LiPs, the strategies involving functional polar substrates as Lithium-sulfur batteries (LSBs) are a class of new-generation rechargeable high-energy-density batteries. However, the persisting issue of lithium polysulfides (LiPs) dissolution and the shuttling effect that impedes the efficiency of LSBs are challenging to resolve. Herein a general synthesis of highly dispersed pyrrhotite Fe 1−x S nanoparticles embedded in hierarchically porous nitrogen-doped carbon spheres (Fe 1−x S-NC) is proposed.Fe 1−x S-NC has a high specific surface area (627 m 2 g −1 ), large pore volume (0.41 cm 3 g −1 ), and enhanced adsorption and electrocatalytic transition toward LiPs. Furthermore, in situ generated large mesoporous pores within carbon spheres can accommodate high sulfur loading of up to 75%, and sustain volume variations during charge/discharge cycles as well as improve ionic/mass transfer. The exceptional adsorption properties of Fe 1−x S-NC for LiPs are predicted theoretically and confirmed experimentally. Subsequently, the electrocatalytic activity of Fe 1−x S-NC is thoroughly verified. The results confirm Fe 1−x S-NC is a highly efficient nanoreactor for sulfur loading. Consequently, the Fe 1−x S-NC nano reactor performs extremely well as a cathodic material for LSBs, exhibiting a high initial capacity of 1070 mAh g −1 with nearly no capacity loss after 200 cycles at 0.5 C. Furthermore, the resulting LSBs display remarkably enhanced rate capability and cyclability even at a high sulfur loading of 8.14 mg cm −2 .

show abstract

Section: Introductionmentioning

confidence: 99%

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

117

View full text Add to dashboard Cite

show abstract

“…目前，化石燃料引起的一系列能源、环境问题已成为当今人类面临的重大课题，这迫切需要开发有效能量转化和能量储存器件。锂离子电池因其具有高能量密度、高循环稳定性、无记性效应等优点成为当前应用最广泛的商用能量储存器件。目前部分商业化的正负极活性材料，如钴酸锂正极、石墨负极等在容量、倍率性能等方面都已接近发展极限。但决定电池容量等性能的关键是正极、负极材料容量的提升。因而，新型电极材料的开发和更新换代有可能为锂离子电池提供更大的发展空间。 2004 年石墨烯 [1] 的发现引发了科学家们对二维材料研究的热潮，硅烯 [2][3] 、锗烯 [4] 、过渡金属硫化物 [5][6] 等二维材料获得了广泛研究。2011 年，新型二维纳米材料 MXene [7] 的发现，极大地丰富了二维家族，并且其结构可调和性质独特促使 MXene 迅速成为研究热点。目前已经发现了 30 多种 MXenes，理论计算和实验研究发现，MXenes 与石墨烯有着类似的结构和性质。MXenes 主要由二维过渡金属碳化物、氮化物和碳氮化物组成，化学式为 Mn+1XTx (n = 1，2，3)，其中，M 表示过渡金属元素，如： Sc、Ti、Nb 和 Zr 等，X 表示碳或氮，Tx 表示在合成过程中表面不可避免地存在的-O、-F、-OH 等官能团，x 表示官能团的数量 [8][9] 。由于 MXenes 具有优异的热稳定性、导电性能、光电性能、力学性能、理论存储容量 [10][11][12][13][14] ，因此在储能、吸附和传感等领域展现出了良好的应用前景 [15][16][17] 。 Ti3C2 作为一种典型的 MXene [18][19] ，Li + 可以在其表面和层间吸附，理论存储容量为 320 mA• h/g [20] ，与石墨(372 mA• h/g)相差不大 [21] 。Li + 在 Ti3C2 中迁移速度快、充放电速率高、被广泛应用于锂离子电池领域 [22] 。实际上，表面端基的存在会使电导率增大，而不含有任何表面端基的 Ti3C2 几乎不存在，故 Ti3C2Tx 具有良好的倍率性能 [23] 。尽管 Ti3C2 具有…”

unclassified

Halogenated Ti₃C₂ MXene as High Capacity Electrode Material for Li-ion Batteries

Xiao¹,

Li²,

Erhong³

et al. 2022

Journal of Inorganic Materials

View full text Add to dashboard Cite

Br -)修饰对锂离子电池中 Ti3C2 负极的原子结构、电学性质、力学性质以及电化学性能的影响。研究表明， Ti3C2T2 单层具有良好的结构稳定性、力学性质和导电性质。相比 Ti3C2F2 和 Ti3C2Br2，Ti3C2Cl2 单层具有较大的弹性模量(沿二维薄膜两个方向的弹性模量分别为 321.70 和 329.43 N/m)、较低的锂离子扩散势垒(0.275 eV)、开路电压(0.54 V)和较大的理论存储容量(化学计量比为 Ti3C2Cl2Li6 时达 674.21 mA• h/g)，这表明 Ti3C2Cl2 单层作为锂电池电极具有良好的安全稳定性和充放电速率。此外，端基氯化扩大了层间距，这提高了 Ti3C2Cl2 中锂离子的可穿透性和快速充放电速率。本研究结果表明表面氯化的 Ti3C2 纳米薄膜是一种很有前途的锂电池负极材料，为其它的 MXenes 基电极材料设计与开发提供了重要的设计思路。

show abstract

“…Moreover,t he battery still maintained about 90 %o f its specific capacity after 1500 cycles at 2C. [249] Other 2D TMDs such as MoS 2 , [259,260] VS 2 , [28,261,262] and NbS 2 [263,264] have been explored as Sh ost materials for Li-S batteries. However,t he intrinsic low electronicc onductivity of TMDs resultsi ns luggish redox reaction kinetics in Li-S batteries.…”

Section: D Tmds For High-energy Li-s and Li-o 2 Batteriesmentioning

confidence: 99%

Two‐Dimensional Transition Metal Chalcogenides for Alkali Metal Ions Storage

Zhang

Liao

et al. 2020

ChemSusChem

View full text Add to dashboard Cite

On the heels of exacerbating environmental concerns and ever‐growing global energy demand, development of high‐performance renewable energy‐storage and ‐conversion devices has aroused great interest. The electrode materials, which are the critical components in electrochemical energy storage (EES) devices, largely determine the energy‐storage properties, and the development of suitable active electrode materials is crucial to achieve efficient and environmentally friendly EES technologies albeit the challenges. Two‐dimensional transition‐metal chalcogenides (2D TMDs) are promising electrode materials in alkali metal ion batteries and supercapacitors because of ample interlayer space, large specific surface areas, fast ion‐transfer kinetics, and large theoretical capacities achieved through intercalation and conversion reactions. However, they generally suffer from low electronic conductivities as well as substantial volume change and irreversible side reactions during the charge/discharge process, which result in poor cycling stability, poor rate performance, and low round‐trip efficiency. In this Review, recent advances of 2D TMDs‐based electrode materials for alkali metal‐ion energy‐storage devices with the focus on lithium‐ion batteries (LIBs), sodium‐ion batteries (SIBs), potassium‐ion batteries (PIBs), high‐energy lithium–sulfur (Li–S), and lithium–air (Li–O2) batteries are described. The challenges and future directions of 2D TMDs‐based electrode materials for high‐performance LIBs, SIBs, PIBs, Li–S, and Li–O2 batteries as well as emerging alkali metal‐ion capacitors are also discussed.

show abstract

Study on the effect of transition metal sulfide in lithium–sulfur battery

Abstract: Three kinds of transition metal sulfides with different electrochemical potentials have been studied as additives to investigate their effect on the electrochemical performance of Li–S batteries.

Cited by 55 publications

References 34 publications

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Halogenated Ti₃C₂ MXene as High Capacity Electrode Material for Li-ion Batteries

Two‐Dimensional Transition Metal Chalcogenides for Alkali Metal Ions Storage

Contact Info

Product

Resources

About

Study on the effect of transition metal sulfide in lithium–sulfur battery

Abstract: Three kinds of transition metal sulfides with different electrochemical potentials have been studied as additives to investigate their effect on the electrochemical performance of Li–S batteries.

Cited by 55 publications

References 34 publications

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Halogenated Ti3C2 MXene as High Capacity Electrode Material for Li-ion Batteries

Two‐Dimensional Transition Metal Chalcogenides for Alkali Metal Ions Storage

Contact Info

Product

Resources

About

Halogenated Ti₃C₂ MXene as High Capacity Electrode Material for Li-ion Batteries