In-situ TEM observation of fast and stable reaction of lithium polysulfide infiltrated carbon composite and its application as a lithium sulfur battery electrode for improved cycle lifetime

Fahad, Saisaban; Wei, Zhen; Kushima, Akihiro

doi:10.1016/j.jpowsour.2021.230175

Cited by 18 publications

(6 citation statements)

References 53 publications

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“…[174][175][176] However, problems such as the low conductivity of S and Li 2 S, and the shuttle effect which means the loss of S as a result of their dissolution and migration in ether-based electrolyte, as well as the large volume changes lead to low reversible capacity and short cycling life, which need to be solved before their practical application. 59,177,178 Designing 1D conned electrode materials within a carbon layer can be one of the most effective strategies to combat these problems. Specically, the energy density can be greatly increased by loading considerable sulphur in the cavity of the 1D conned structure.…”

Section: Energy Storage Applicationmentioning

confidence: 99%

1D confined materials synthesized via a coating method for thermal catalysis and energy storage applications

Yuan

Lin

et al. 2022

J. Mater. Chem. A

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Section: Energy Storage Applicationmentioning

confidence: 99%

1D confined materials synthesized via a coating method for thermal catalysis and energy storage applications

Yuan

Lin

et al. 2022

J. Mater. Chem. A

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“…30 For the applications of CF in LIB cathodes, using CF as the cathode host for sulfur or polysulfide fastened the electrochemical reactions and minimized the volume change during lithiation/ delithiation. 31,32 As aforementioned, the CF cathode framework can support electrode materials without requiring any insulating organic binder because the fiber bundles are strong and flexible. [33][34][35] Simultaneously, it can provide a three-dimensional (3D) conductive network for electron transport.…”

Section: Introductionmentioning

confidence: 99%

“…Compositing the Li metal with CF mitigated the formation of Li dendrite on the anode and hence improved the cycling life span and even the safety issue of batteries 30 . For the applications of CF in LIB cathodes, using CF as the cathode host for sulfur or polysulfide fastened the electrochemical reactions and minimized the volume change during lithiation/delithiation 31,32 . As aforementioned, the CF cathode framework can support electrode materials without requiring any insulating organic binder because the fiber bundles are strong and flexible 33‐35 .…”

Section: Introductionmentioning

confidence: 99%

Using conductive carbon fabric to fabricate binder‐free Ni‐rich cathodes for Li‐ion batteries

Sireesha

2021

Intl J of Energy Research

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Summary Carbon fabric is proposed as an alternative current collector for fabricating water‐processed LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes in order to prevent electrode corrosion problems from the use of conventional Al foil. The interlaced fiber bundles in carbon fabric feature plenty of voids and a large surface area to accommodate electrode materials without requiring an insulating binder. Further, the connected network structure of carbon fabric serves as a three‐dimensional pathway for electron transport. However, our experiments also reveal the necessity to adopt a conductive agent, although a very high content of it reduces the uniform distribution of cathode materials. When increasing the content of conductive agent from 3% to 15%, capacity retention of the corresponding NCM811 cell rises from 76% to 93% after charge/discharge at 0.5 C for 300 cycles. The causes of this increase are discussed.

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“…[16,17] In addition, polar materials such as metal oxides, metal carbides and metal sulfides have proven effective in trapping polysulfides and providing more reaction sites. [17][18][19] Other modifications were achieved by using solid electrolytes, [20] selecting adequate binders, [21] employing lithium polysulfide catholyte, [22] inserting an interlayer, [23] and modifying separators. [24,25] Despite the improvements that have been achieved by these approaches, some procedures require complicated fabrication processes.…”

Section: Introductionmentioning

confidence: 99%

A Liquid‐Metal Electrocatalyst as a Self‐Healing Anchor to Suppress Polysulfide Shuttling in Lithium‐Sulfur Batteries

Fahad

Zhang

Zhai

et al. 2022

Batteries & Supercaps

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Lithium‐sulfur battery (LSB) is a promising next generation energy storage technology due to its high theoretical capacity, low cost, and environmental friendliness surpassing current lithium‐ion batteries. However, several challenges restrict the practical applications of LSBs. A major obstacle that limits its performance is the dissolution of long‐chain lithium polysulfides into the electrolyte which results in loss of active material and capacity fade during the charge/discharge cycles. Here, we developed a novel sulfur composite with liquid‐metal (LM) nanoparticles and reduced graphene oxide (rGO) dispensed on a carbon‐cloth electrode to achieve long cycling of LSBs. The liquid nature of the LM nanoparticles results in many advantages. It provides a strong anchoring with sulfur inhibiting the polysulfide shuttle effect. In addition, it prevents the detachment of the sulfur particles from the current collector albeit large volume changes and cracking of the sulfur during lithiation and delithiation, maintaining the electron conduction paths. This innovative composite resulted in a high discharge capacity, an outstanding capacity retention, and a high Coulombic efficiency. Our results demonstrate an effective method to suppress the polysulfide shuttle effect and pave a new path towards practical applications of LSBs by using multifunctional LM nanoparticles composites.

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In-situ TEM observation of fast and stable reaction of lithium polysulfide infiltrated carbon composite and its application as a lithium sulfur battery electrode for improved cycle lifetime

Cited by 18 publications

References 53 publications

1D confined materials synthesized via a coating method for thermal catalysis and energy storage applications

1D confined materials synthesized via a coating method for thermal catalysis and energy storage applications

Using conductive carbon fabric to fabricate binder‐free Ni‐rich cathodes for Li‐ion batteries

A Liquid‐Metal Electrocatalyst as a Self‐Healing Anchor to Suppress Polysulfide Shuttling in Lithium‐Sulfur Batteries

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