A functional interlayer as a polysulfides blocking layer for high-performance lithium–sulfur batteries

Yin, Lingxia; Dou, Hui; Wang, Aixiu; Xu, Guiyin; Nie, Ping; Chang, Zhi; Zhang, Xiaogang

doi:10.1039/c7nj03675b

Cited by 38 publications

(25 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 25 ] And there is only a broad peak at around 25° for the bare PANI sample (Figure S1, Supporting Information), which can be associated with the polymer chains. [ 41 ] After the VOH@PANI nanowires have been synthesized, the (001) peak shifts to a lower 2θ value, indicating a small amount of PANI has also been inserted into the V 2 O 5 layers. [ 42 ] Thermogravimetric analyses (TGA) are conducted to calculate the n value of VOH nanowires and the content of PANI in the VOH@PANI nanowires.…”

Section: Resultsmentioning

confidence: 99%

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

et al. 2021

View full text Add to dashboard Cite

Designing multi‐functional separators is one of the effective strategies for achieving high‐performance lithium–sulfur (Li–S) batteries. In this work, polyaniline (PANI) encapsulated amorphous vanadium pentoxide (V2O5) nanowires (general formula V2O5·nH2O and abbreviated as VOH) are synthesized by a facile in situ chemical oxidative polymerization method, and utilized as a basic building block for the preparation of functional interlayers on the commercial polypropylene (PP) separator, generating a VOH@PANI‐PP separator with multi‐functionalities. Compared to the crystalline V2O5, the amorphous V2O5 shows enhanced properties of polysulfide adsorption, catalytic activity, as well as ionic conductivity. Therefore, within the VOH@PANI‐PP separator, the amorphous V2O5 nanowire component contributes to the strong adsorption of polysulfides, the high catalytic activity for polysulfides conversion, and the high ionic conductivity. The PANI component further strengthens the above effects, improves the electrical conductivity, and enhances the flexibility of the modified separator. Benefiting from the synergistic effects, the VOH@PANI‐PP separator effectively suppresses polysulfide shuttling and improves the cycling stability of its composed Li–S batteries. This work provides a new research strategy for the development of efficient separators in rechargeable batteries by judiciously integrating the amorphous metal oxide with a conductive polymer.

show abstract

Section: Resultsmentioning

confidence: 99%

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

et al. 2021

View full text Add to dashboard Cite

show abstract

“…PANI can be polymerized in situ onto the graphene (G) and GO sheet to obtain the PANI-G and PANI-GO membrane, the sulfur nanoparticles are sandwiched between the membranes to form a ternary sandwich structure. The conductive PANI-G and PANI-GO networks not only buffered a huge volume expansion of the sulfur, but also mitigated the diffusion of lithium polysulfides to the Li anode by a chemical interaction between the imine group (-N=) of the quinoid ring and polysulfides, finally resulted in excellent electrochemical performance [141,142]. CNTs are widely employed as supporting materials because of high conductivity, large specific surface area and excellent mechanical properties.…”

Section: Lithium-sulfur Batteries (Lsbs)mentioning

confidence: 99%

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

Gong

2020

Materials

115

View full text Add to dashboard Cite

Conducting polyaniline (PANI) with high conductivity, ease of synthesis, high flexibility, low cost, environmental friendliness and unique redox properties has been extensively applied in electrochemical energy storage and conversion technologies including supercapacitors, rechargeable batteries and fuel cells. Pure PANI exhibits inferior stability as supercapacitive electrode, and can not meet the ever-increasing demand for more stable molecular structure, higher power/energy density and more N-active sites. The combination of PANI and other active materials like carbon materials, metal compounds and other conducting polymers (CPs) can make up for these disadvantages as supercapacitive electrode. As for rechargeable batteries and fuel cells, recent research related to PANI mainly focus on PANI modified composite electrodes and supported composite electrocatalysts respectively. In various PANI based composite structures, PANI usually acts as a conductive layer and network, and the resultant PANI based composites with various unique structures have demonstrated superior electrochemical performance in supercapacitors, rechargeable batteries and fuel cells due to the synergistic effect. Additionally, PANI derived N-doped carbon materials also have been widely used as metal-free electrocatalysts for fuel cells, which is also involved in this review. In the end, we give a brief outline of future advances and research directions on PANI.

show abstract

“…[1][2][3][4][5] LIBs consisting of a graphite anode and a lithium metal oxide cathode give an energy density of ≈150 Wh kg −1 , good rate capability, and long cycle performance. Representatively, as of August 2018, the raw oxide (GO), [46,47] and carbon nanotubes (CNTs) [48] were applied to the host material of the interlayer for Li-S batteries because of low density, high electrical conductivity, and specific surface area. Representatively, as of August 2018, the raw oxide (GO), [46,47] and carbon nanotubes (CNTs) [48] were applied to the host material of the interlayer for Li-S batteries because of low density, high electrical conductivity, and specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Carbon Nanotube Bilayer Flexible Membrane for High‐Performance Li–S Batteries with Superior Physical and Electrochemical Properties

Lee

Kim

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

material costs of cobalt (Co) and nickel (Ni) for LiNiMnCoO 2 (NMC) are 28.46 USD per lb and 5.57 USD per lb, respectively. [8] In order to secure cost effectiveness, lithium-sulfur (Li-S) batteries have been considered one of the most attractive energy storage systems because of their high theoretical capacity (1672 mAh g −1 ), energy density (2600 Wh kg −1 ), nontoxicity, low cost, and the natural abundance of sulfur. [9,10] Nevertheless, there are obstacles that should be overcome for the development of Li-S batteries, including the insulating nature of sulfur (5 × 10 −30 S cm −1 ), the large volume change of sulfur (≈80%), and the poor cycle performance by the shuttle phenomenon. In particular, the shuttle phenomenon is caused by the high solubility of the lithium polysulfide intermediate (Li 2 S X , 2 < X ≤ 8) in the electrolyte. These lithium polysulfides diffuse to the Li metal anode, leading to a loss of sulfur from the sulfur electrode and low coulombic efficiency (CE). [11,12] To resolve these issues, most studies have focused on fabricating an inhibitor to trap the lithium polysulfides in the cathode side through chemical/physical adsorption, such as the interlayer inserted between the sulfur electrode and the separator with a metal oxide, [13][14][15] conductive carbon material, [16] polymers, [17][18][19][20][21][22] Al 2 O 3 , [23][24][25][26] Ni foam, [27,28] CoS 2 , [29,30] and metal carbide. [31,32] Among them, conductive carbon materials such as carbon fiber, [33][34][35][36][37] porous carbon, [38][39][40][41][42] graphite, [43][44][45] graphene Developing a highly effective interlayer inserted between the sulfur electrode and separator is one of the most important issues in Li-S battery research, because this interlayer enhances the cycle performance of the Li-S battery by trapping the lithium polysulfides in the sulfur electrode. Among various interlayer materials, carbon materials such as graphene and carbon nanotubes are particularly appealing because of their high electrical conductivity. Here, a new flexible carbon membrane interlayer consisting of graphene oxide (GO) and carbon nanotubes (CNTs) is developed by a facile vacuum filtration approach to trap the lithium polysulfides in the sulfur electrode.When the GO/CNT bilayer membrane is used as an interlayer between the sulfur electrode and separator (glass fiber), the Li-S battery delivers an initial discharge capacity of 1591.56 mAh g −1 and maintains a capacity of about 1000 mAh g −1 over 50 cycles at 0.2C with a low potential difference of 150 mV. This reflects higher electrochemical performance than a GO or CNT monolayer unilaterally. This is attributed to the hydrophilic functional group of the GO layer strongly adsorbing lithium polysulfides dissolved in liquid electrolyte and the CNT layer enhancing the ion conductivity.

show abstract

A functional interlayer as a polysulfides blocking layer for high-performance lithium–sulfur batteries

Abstract: Self-standing polyaniline–graphene oxide (PANI–GO) interlayer inhibits the shuttle effect by the physical barrier and chemisorption, improving the electrochemical performance for Li–S batteries.

Cited by 38 publications

References 51 publications

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

Graphene Oxide/Carbon Nanotube Bilayer Flexible Membrane for High‐Performance Li–S Batteries with Superior Physical and Electrochemical Properties

Contact Info

Product

Resources

About

A functional interlayer as a polysulfides blocking layer for high-performance lithium–sulfur batteries

Abstract: Self-standing polyaniline–graphene oxide (PANI–GO) interlayer inhibits the shuttle effect by the physical barrier and chemisorption, improving the electrochemical performance for Li–S batteries.

Cited by 38 publications

References 51 publications

Polyaniline Encapsulated Amorphous V2O5 Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

Polyaniline Encapsulated Amorphous V2O5 Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

Graphene Oxide/Carbon Nanotube Bilayer Flexible Membrane for High‐Performance Li–S Batteries with Superior Physical and Electrochemical Properties

Contact Info

Product

Resources

About

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries

Polyaniline Encapsulated Amorphous V₂O₅ Nanowire‐Modified Multi‐Functional Separators for Lithium–Sulfur Batteries