Facile assembly of partly graphene-enveloped sulfur composites in double-solvent for lithium–sulfur batteries

Wei, Meng; Yuan, Peiling; Chen, Weihua; Hu, Junhua; Mao, Jing; Shao, Guosheng

doi:10.1016/j.electacta.2015.07.174

Cited by 24 publications

(8 citation statements)

References 53 publications

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“…Significant efforts are undertaken by the scientific community to pair the Li metal (3,860 mA h/g) anode, with high capacity sulfur 6 https://www.bloomberg.com/graphics/2017-lithium-battery-future/ cathode (1,675 mAhg −1 ). This combination is expected to lead to a 500 Wh kg −1 cell doubling the gravimetric energy of commercial Li ion batteries (∼243 Wh kg −1 ) (Wei et al, 2015;Moreno et al, 2016). However, lithium metal anode needs to be shielded from conventional electrolytes and polysulfides shuttling.…”

Section: Novel Electrode Chemistries and Future Challengesmentioning

confidence: 99%

Batteries Safety: Recent Progress and Current Challenges

2019

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In this growing age of clean energy and the use of power storage to circumvent the use of traditional fossil fuel technologies, batteries of greater capacity, storage, and power are increasingly becoming indispensable. New chemistries are being developed to increase the capacity of traditional lithium ion batteries and to develop batteries beyond Lithium ion. Promising high capacity cathodes and anodes are developed however their large-scale deployment is hindered due to safety concerns. In this review, we summarize recent progress of lithium ion batteries safety, highlight current challenges, and outline the most advanced safety features that may be incorporated to improve battery safety for both lithium ion and batteries beyond lithium ion. Of particular interest is the issue of thermal runaway mitigation by incorporation of novel nano-materials and advanced technologies.

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Section: Novel Electrode Chemistries and Future Challengesmentioning

confidence: 99%

Batteries Safety: Recent Progress and Current Challenges

2019

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“…The theoretical capacity of the sulfur cathode is 1675 mAh g –1 , and the Li–S battery itself is expected to give 500 Wh kg –1 of gravimetric energy, in comparison to the gravimetric energy of Li-ion cell of ∼243 Wh kg –1 , , Figure .…”

Section: Introductionmentioning

confidence: 99%

“…Magnesium-ion batteries provide better energy per unit volume, yet the closest to the market are lithium−sulfur batteries. 2 The theoretical capacity of the sulfur cathode is 1675 mAh g −1 , and the Li−S battery itself is expected to give 500 Wh kg −1 of gravimetric energy, in comparison to the gravimetric energy of Li-ion cell of ∼243 Wh kg −1 , 6,7 Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Lithium–Sulfur Batteries: State of the Art and Future Directions

Ould‐Ely

Kamzabek

Chakraborty

et al. 2018

ACS Appl. Energy Mater.

116

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Sulfur remains in the spotlight as a future cathode candidate for the post-lithium-ion age. This is primarily due to its low cost and high discharge capacity, two critical requirements for any future cathode material that seeks to dominate the market of portable electronic devices, electric transportation, and electric-grid energy storage. However, before Li–S batteries replace lithium ion batteries, several technical challenges need to be solved. Among these challenges are polysulfide containment, the increase of sulfur loading (which must be ≥4–6 mg cm –2), the increase of sulfur fraction to ≥70%, the increase of sulfur utilization to ≥80%, the decrease of the electrolyte/sulfur weight ratio (which must be in the range of 3:1 or lower), and the stability of lithium anode material. Besides traditional carbon coating strategies, recent novel strategies addressing each of these challenges have been reported. The main purpose of this work is to review the state of the art and summarize and shed light on the most promising recent discoveries related to each challenge. This review also addresses the role of the electrolyte systems and electrocatalytic additives.

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“…[8,16] Amongt hese nanocarbon materials, graphene, as a2 Dn anomaterials with superior structural flexibility and conductivity,h as shown great potential in enhancing electricalconductivity. [16][17][18][19][20] Herein, we report the design and fabrication of ad ual-confined core-shell structure, in which sulfur nanoparticlesa re encapsulated by hollow TiO 2 spheres, followed by ag raphene coating (Scheme1). The presence of as-synthesized TiO 2 in cathodem aterials for LiÀSb atteries has as trong inhibiting effect on the polysulfidest hrough strong chemical interactions with the lithium polysulfides ions, therebyb ridging the shortfall in existing sulfur/carbon composites.…”

Section: Introductionmentioning

confidence: 99%

“…To ameliorate their conductivity, the introduction of nanocarbon additives that wrap around the active materials have recently become popular, owing to their high conductivity and structural diversity . Among these nanocarbon materials, graphene, as a 2D nanomaterials with superior structural flexibility and conductivity, has shown great potential in enhancing electrical conductivity …”

Section: Introductionmentioning

confidence: 99%

Dual‐Confined Sulfur Nanoparticles Encapsulated in Hollow TiO₂ Spheres Wrapped with Graphene for Lithium–Sulfur Batteries

Fan

Tang

Chen

et al. 2016

Chemistry An Asian Journal

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Lithium-sulfur (Li-S) batteries are attractive owing to their higher energy density and lower cost compared with the universally used lithium-ion batteries (LIBs), but there are some problems that stop their practical use, such as low utilization and rapid capacity-fading of the sulfur cathode, which is mainly caused by the shuttle effect, and the uncontrollable deposition of lithium sulfide species. Herein, we report the design and fabrication of dual-confined sulfur nanoparticles that were encapsulated inside hollow TiO spheres; the encapsulated nanoparticles were prepared by a facile hydrolysis process combined with acid etching, followed by "wrapping" with graphene (G-TiO @S). In this unique composite architecture, the hollow TiO spheres acted as effective sulfur carriers by confining the polysulfides and buffering volume changes during the charge-discharge processes by means of physical force from the hollow spheres and chemical binding between TiO and the polysulfides. Moreover, the graphene-wrapped skin provided an effective 3D conductive network to improve the electronic conductivity of the sulfur cathode and, at the same time, to further suppress the dissolution of the polysulfides. As results, the G-TiO @S hybrids exhibited a high and stable discharge capacity of up to 853.4 mA h g over 200 cycles at 0.5 C (1 C=1675 mA g ) and an excellent rate capability of 675 mA h g at a current rate of 2 C; thus, G-TiO @S holds great promise as a cathode material for Li-S batteries.

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Facile assembly of partly graphene-enveloped sulfur composites in double-solvent for lithium–sulfur batteries

Cited by 24 publications

References 53 publications

Batteries Safety: Recent Progress and Current Challenges

Batteries Safety: Recent Progress and Current Challenges

Lithium–Sulfur Batteries: State of the Art and Future Directions

Dual‐Confined Sulfur Nanoparticles Encapsulated in Hollow TiO₂ Spheres Wrapped with Graphene for Lithium–Sulfur Batteries

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Facile assembly of partly graphene-enveloped sulfur composites in double-solvent for lithium–sulfur batteries

Cited by 24 publications

References 53 publications

Batteries Safety: Recent Progress and Current Challenges

Batteries Safety: Recent Progress and Current Challenges

Lithium–Sulfur Batteries: State of the Art and Future Directions

Dual‐Confined Sulfur Nanoparticles Encapsulated in Hollow TiO2 Spheres Wrapped with Graphene for Lithium–Sulfur Batteries

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Dual‐Confined Sulfur Nanoparticles Encapsulated in Hollow TiO₂ Spheres Wrapped with Graphene for Lithium–Sulfur Batteries