Electroactive cellulose-supported graphene oxide interlayers for Li–S batteries

Zeng, Qingcong; Leng, Xue; Wu, Kuang‐Hsu; Gentle, Ian R.; Wang, Da‐Wei

doi:10.1016/j.carbon.2015.05.095

Cited by 73 publications

(34 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, a Li/S cell with such a cathode material 5 exhibited an initial capacity of 1165 mAh/g and remained 792 mAh/g after 200 cycles at 0.2C even when the sulphur content in the S-C composite reached as high as 89 wt.%. The XPS analyses verify that the excellent capacity and capacity retention are due to the enhanced CAD of carbon surface to sulphur species via the C- 10 S and S-O bonds. However, discrepant results were reported by Li et al 16 who introduced oxygens into carbon by treating carbon with CO2 at 1050 o C for several minutes and prepared a S-C composite by heating the sulphur-carbon mixture at 150 o C for 9 h and at 300 o C for additional 3 h. The cathode made by such a composite 15 showed inferior performance, which these authors attributed to the reduced conductivity and possible side reactions occurring between sulphur and surface oxygens.…”

Section: Oxygen-doped Carbons (Odc)mentioning

confidence: 74%

“…1 and eqn. 2, and the sequestrating ability increases with a decrease in the length of 10 polysulphide chains (i.e., the n value in the -Snchain). In solutions, it is possible for sulphur to covalently insert into the short -Snchains, forming longer chains, as indicated by eqn.…”

Section: Sulphur-doped Carbons (Sdc)mentioning

confidence: 99%

“…35,45 Suitable temperature for the PAN sulphurization is in a range of 280 to 550 o C, which typically generates SPAN with a sulphur 5 content of 30-55 wt.%. In general, high temperature leads to low sulphur content and short polysulphide chain with relatively high electronic conductivity, which corresponds to low specific capacity but stable capacity retention; low temperature can neither break down the S8 ring into small Sn molecules nor dehydrogenate 10 polymer effectively, resulting in high sulphur content and long polysulphide chain with relatively low electronic conductivity, which corresponds to high specific capacity but fast capacity fading. 46, 47 Since the short polysulphide chains are covalently bound to the polymer backbone, the SPANs are thermally stable 15 until 450 o C and do not form soluble PS in discharge, exhibiting very stable capacity retention, extremely low self-discharge, and excellent safety.…”

Section: Sulphur-doped Carbons (Sdc)mentioning

confidence: 99%

“…Sulphur sequestration of NDC is mainly through the chemical binding between the Li + ion 5 in Li2Sn and the strong electron-donating lone-pair electrons in nitrogen, namely the LiSnLi +… N binding. The similar princple is well-known in solution chemistry and has long been used for the syntheses of polysulphide clusters of alkaline earth metals and transition metals, in which N-containing solvents were frequently 10 used to promote the dissolution of polysulphide clusters through strong solvation between the metal ion and the lone-pair electrons of nitrogen. [54][55][56] Beside the LiSnLi +… N binding, the C-S bond makes additional contribution to the sulphur sequestration because the synthetic carbons contain more or less hydrogens that are 15 dehydrogenated by sulphur and subsequently vulcanized to form C-S bond in the process of making S-C composites.…”

Section: Nitrogen-doped Carbons (Ndc)mentioning

confidence: 99%

“…There are two general approaches for the synthesis of HA-doped carbons: (1) the treatment of commercial or synthetic carbons with HA source and (2) the pyrolysis of HA-containing precursors. The former features 10 the HAs doped on the surface of carbon with low HA content (typically not higher than 5 wt.%), and the latter features the HAs doped throughout the carbon bulk with high HA content up to more than 20 wt.%, for example 21.6 wt.% N for a N-doped carbon prepared by carbonizing N-containing ionic liquids. 9 Introduction 15 of HAs into carbon changes the electronic distribution of the carbon conductive networks.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Heteroatom-doped carbons: synthesis, chemistry and application in lithium/sulphur batteries

Zhang

2015

Inorg. Chem. Front.

109

View full text Add to dashboard Cite

Doping of heteroatoms into carbon not only changes the electronic distribution but also creates surface functional groups. These changes prove to enhance the chemical adsorption of carbon to sulphur species, and have been intensively investigated to sequestrate soluble lithium polysulphide in the cathode of lithium/sulphur (Li/S) batteries. The chemical adsorption varies with the type, valence state and content 10 of heteroatoms in a complicated manner. In this review, the syntheses of heteroatom-doped carbons as well as their applications and mechanism in the Li/S batteries are highlighted and discussed with focus on oxygen, sulphur, nitrogen and their mixtures. Synthesis and basic properties of HA-doped65 carbons

show abstract

Section: Oxygen-doped Carbons (Odc)mentioning

confidence: 74%

Section: Sulphur-doped Carbons (Sdc)mentioning

confidence: 99%

Section: Sulphur-doped Carbons (Sdc)mentioning

confidence: 99%

Section: Nitrogen-doped Carbons (Ndc)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Heteroatom-doped carbons: synthesis, chemistry and application in lithium/sulphur batteries

Zhang

2015

Inorg. Chem. Front.

109

View full text Add to dashboard Cite

show abstract

Interface Design and Development of Coating Materials in Lithium–Sulfur Batteries

Sun

2018

Adv Funct Materials

View full text Add to dashboard Cite

High-energy Li-S batteries have received extensive attention and are considered to be the most promising next-generation electric energy storage devices beyond Li-ion batteries. Interface design is an important direction to address challenges in the development of Li-S batteries. This review summarizes recently developed coatings and interlayer materials at various interfaces of Li-S batteries. In particular, advanced nanostructures and novel fabrication methods of coating and interlayer materials applied to Li-S batteries are highlighted. Furthermore, underlying mechanisms at the interfaces and electrochemical performance of the developed Li-S batteries are also discussed. Finally, existing challenges and the future development of interface design in high-energy Li-S batteries are summarized and prospected.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201801323. and the mechanical damage of electrode caused by the volume expansion induces a rapid decrease of battery capacity. In terms of the anode, most Li-S batteries still use lithium metal which poses challenges of both safety and performance in Li-S batteries. [5] First, side reactions triggered by polysulfides and the surrounding electrolyte consume lithium metal quickly and form an insulated interlayer on the lithium metal, which damages the Li anode structure and blocks Li/Li + transformation. [2a,6] Second, similar to Li-ion batteries, lithium anodes suffer from the inevitable growth of lithium dendrites, which poses safety concerns in Li-S batteries. [7] As a result, all of these challenges hinder the development of high-energy Li-S batteries in practical applications. [8] A number of researchers and scientists have devoted relentless effort to address the challenges of Li-S batteries, such as the development of various carbon hosts, engineering the electrode structure, optimization of electrolytes, as well as coupling with high-energy anode materials. [1c,2c,3c,9] Among the recent literature, the investigation and modification of interfaces via coating and interlayer materials are very promising and prevailing strategies in Li-S batteries. [1c,2c,3c,10] As shown in Figure 1b-d, this review is divided into three parts based on different interface areas, which are the interfaces at i) sulfur cathodes, ii) separators, and iii) lithium anodes. Based on the issues at different interfaces, various design principles and requirements of coating and interlayer materials are developed. This review summarizes the study of interface design with coating and interlayer materials for Li-S batteries at different interfaces. The content covers structure design, synthetic approach, electrochemical performance, reaction mechanisms, as well as future perspectives of coating materials applied to Li-S batteries. Interface Design on Sulfur-Based Cathodes in Li-S BatteriesDissolution of polysulfides in organic liquid electrolytes and accompanied "shuttle effect" side reactions are severe challenges of c...

show abstract

Structure–Property Relationships of Organic Electrolytes and Their Effects on Li/S Battery Performance

et al. 2017

View full text Add to dashboard Cite

Electrolytes, which are a key component in electrochemical devices, transport ions between the sulfur/carbon composite cathode and the lithium anode in lithium-sulfur batteries (LSBs). The performance of a LSB mostly depends on the electrolyte due to the dissolution of polysulfides into the electrolyte, along with the formation of a solid-electrolyte interphase. The selection of the electrolyte and its functionality during charging and discharging is intricate and involves multiple reactions and processes. The selection of the proper electrolyte, including solvents and salts, for LSBs strongly depends on its physical and chemical properties, which is heavily controlled by its molecular structure. In this review, the fundamental properties of organic electrolytes for LSBs are presented, and an attempt is made to determine the relationship between the molecular structure and the properties of common organic electrolytes, along with their effects on the LSB performance.

show abstract

Electroactive cellulose-supported graphene oxide interlayers for Li–S batteries

Cited by 73 publications

References 48 publications

Heteroatom-doped carbons: synthesis, chemistry and application in lithium/sulphur batteries

Heteroatom-doped carbons: synthesis, chemistry and application in lithium/sulphur batteries

Interface Design and Development of Coating Materials in Lithium–Sulfur Batteries

Structure–Property Relationships of Organic Electrolytes and Their Effects on Li/S Battery Performance

Contact Info

Product

Resources

About