3D Interconnected Electrode Materials with Ultrahigh Areal Sulfur Loading for Li–S Batteries

Fang, Ruopian; Zhao, Shiyong; Hou, Peng‐Xiang; Cheng, Hui‐Ming; Wang, S.G.; Liu, Chang; Li, Feng

doi:10.1002/adma.201506014

Cited by 508 publications

(360 citation statements)

References 35 publications

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“…9), it can be noted that the TiO@C-HS/S electrode of this work exhibits much enhanced areal capacities and very attractive cycling stability at high sulfur loading. Although the areal capacity reported here is not the highest compared with some recently reported carbon-based electrodes515253, we believe that by further optimizing the design for the TiO/C-based cathode and other components in the cell, it is very possible to significantly enhance the electrochemical performance of Li–S battery.…”

Section: Resultscontrasting

confidence: 55%

A sulfur host based on titanium monoxide@carbon hollow spheres for advanced lithium–sulfur batteries

et al. 2016

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Lithium–sulfur batteries show advantages for next-generation electrical energy storage due to their high energy density and cost effectiveness. Enhancing the conductivity of the sulfur cathode and moderating the dissolution of lithium polysulfides are two key factors for the success of lithium–sulfur batteries. Here we report a sulfur host that overcomes both obstacles at once. With inherent metallic conductivity and strong adsorption capability for lithium-polysulfides, titanium monoxide@carbon hollow nanospheres can not only generate sufficient electrical contact to the insulating sulfur for high capacity, but also effectively confine lithium-polysulfides for prolonged cycle life. Additionally, the designed composite cathode further maximizes the lithium-polysulfide restriction capability by using the polar shells to prevent their outward diffusion, which avoids the need for chemically bonding all lithium-polysulfides on the surfaces of polar particles.

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Section: Resultscontrasting

confidence: 55%

A sulfur host based on titanium monoxide@carbon hollow spheres for advanced lithium–sulfur batteries

et al. 2016

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“…Excellent cycling stability with up to 90% capacity retention was demonstrated by the electrodes, which is mainly attributed to the effectively reduced lithium polysulfide agglomeration due to the abundant pores of the dendrimers. Nevertheless, it should be noted that the reversible discharge capacity is around 600 mA h g −1 at 0.2 C. In other words, only an areal discharge capacity of around 2.4 mA h cm −2 can be delivered, which is even less than the state-of-theart Li-ion batteries (typically 4 mA h cm −2 ) [163,170]. A 7.2 mg cm −2 sulfur-loaded electrode with similar components was also obtained by using a modified polybenzimidazole (mPBI).…”

Section: A 2d Current Collector Design For High-loading Cathodesmentioning

confidence: 93%

“…Nanocarbon materials with high specific areas and large pore volumes have received significant attention due to their economic value, large-scale reliability, ability to shorten ion/electron transport pathways and availability of active sites [53, [159][160][161][162]. However, a problem associated with many nanocarbon materials is that they are difficult to be anchored on the current collector, leading to delamination and loss of active materials [161,163]. What's worse, if the detached electrode materials can make contact with the opposing electrode, short-circuiting will occur and may lead to severe safety hazards.…”

Section: A 2d Current Collector Design For High-loading Cathodesmentioning

confidence: 99%

“…8a) [68,163,[175][176][177][178][179][180]. Compared with the 2D current collector cathodes, the abundant pore networks in the 3D architectures can accommodate more electrode materials and electrolyte and have been demonstrated to be effective in increasing the sulfur loading and improving electrochemical performance [163]. Typically, 1D (carbon nanotube, fiber) and 2D (graphene) nanomaterials are chosen to fabricate 3D structures due to their ability to intertwine with each other and provide excellent mechanical strength.…”

Section: B 3d Current Collector Design For High-loading Cathodesmentioning

confidence: 99%

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Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

Yang

Adair

et al. 2018

Electrochem. Energ. Rev.

343

206

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Lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage devices that have the potential to deliver energy densities that supersede that of state-of-the-art lithium ion batteries. Due to their high theoretical energy density and cost-effectiveness, Li-S batteries have received great attention and have made great progress in the last few years. However, the insurmountable gap between fundamental research and practical application is still a major stumbling block that has hindered the commercialization of Li-S batteries. This review provides insight from an engineering point of view to discuss the reasonable structural design and parameters for the application of Li-S batteries. Firstly, a systematic analysis of various parameters (sulfur loading, electrolyte/sulfur (E/S) ratio, discharge capacity, discharge voltage, Li excess percentage, sulfur content, etc.) that influence the gravimetric energy density, volumetric energy density and cost is investigated. Through comparing and analyzing the statistical information collected from recent Li-S publications to find the shortcomings of Li-S technology, we supply potential strategies aimed at addressing the major issues that are still needed to be overcome. Finally, potential future directions and prospects in the engineering of Li-S batteries are discussed.

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“…The self-supporting structure enables the preparation of binder-free cathodes, thereby directly increasing the practical energy density. Most concepts utilizing aerogels for Li-S battery electrodes, reported so far, have significant drawbacks such as complicated synthesis procedures and low performance21222324.…”

mentioning

confidence: 99%

A binder-free sulfur/reduced graphene oxide aerogel as high performance electrode materials for lithium sulfur batteries

Nitze

Agostini

Lundin

et al. 2016

Sci Rep

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Societies’ increasing need for energy storage makes it necessary to explore new concepts beyond the traditional lithium ion battery. A promising candidate is the lithium-sulfur technology with the potential to increase the energy density of the battery by a factor of 3–5. However, so far the many problems with the lithium-sulfur system have not been solved satisfactory. Here we report on a new approach utilizing a self-standing reduced graphene oxide based aerogel directly as electrodes, i.e. without further processing and without the addition of binder or conducting agents. We can thereby disrupt the common paradigm of “no battery without binder” and can pave the way to a lithium-sulfur battery with a high practical energy density. The aerogels are synthesized via a one-pot method and consist of more than 2/3 sulfur, contained inside a porous few-layered reduced graphene oxide matrix. By combining the graphene-based aerogel cathode with an electrolyte and a lithium metal anode, we demonstrate a lithium-sulfur cell with high areal capacity (more than 3 mAh/cm2 after 75 cycles), excellent capacity retention over 200 cycles and good sulfur utilization. Based on this performance we estimate that the energy density of this concept-cell can significantly exceed the Department of Energy (DEO) 2020-target set for transport applications.

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3D Interconnected Electrode Materials with Ultrahigh Areal Sulfur Loading for Li–S Batteries

Cited by 508 publications

References 35 publications

A sulfur host based on titanium monoxide@carbon hollow spheres for advanced lithium–sulfur batteries

A sulfur host based on titanium monoxide@carbon hollow spheres for advanced lithium–sulfur batteries

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

A binder-free sulfur/reduced graphene oxide aerogel as high performance electrode materials for lithium sulfur batteries

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