Sulfur Nanodots Stitched in 2D “Bubble-Like” Interconnected Carbon Fabric as Reversibility-Enhanced Cathodes for Lithium–Sulfur Batteries

Wu, Feng; Ye, Yusheng; Huang, Jia‐Qi; Zhao, Teng; Qian, Jiasheng; Zhao, Yuanyuan; Li, Li; Wei, Lei; Luo, Rui; Huang, Yong-Chang; Xing, Yi; Chen, Renjie

doi:10.1021/acsnano.7b00596

Cited by 90 publications

(64 citation statements)

References 56 publications

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“…The initial R ct of the P-Li/ NCM523 pouch cell (34 mΩ) is slightly higher than that of MSI-Li/NCM523 pouch cell (12 mΩ). 2020, 10,1903362 [19] Li, [20] and Niu et al [6a] ) with similar energy density and capacity. This indicates that the MSI effectively prevents the parasitic reactions between the Li metal and the electrolyte, reducing the thickness of the "dead Li" layer and thus facilitating the transport of Li ions.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Silanization Interface for High‐Energy and Low‐Gassing Lithium Metal Pouch Cells

Gao

Guo

Yuan

et al. 2019

Advanced Energy Materials

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hinder the practical deployment of Li metal batteries. Thus far, various emerging strategies, including electrolyte optimization, [2] solid electrolyte application, [3] and artificial protective layer construction, [4] have been proposed to stabilize SEI. These strategies have achieved remarkable electrochemical performances and provided perspectives for developing long lifespan Li metal batteries. Regrettably, most of them were conducted in a coin cell setting. The resulted from different test conditions make it exceedingly difficult to compare the developed materials or concepts for practical application. [5] In real high-energy Li metal batteries, any minor defects (such as Li dendrites, interface parasitic reactions, and volume expansion) will be aggravated, leading to unstable cycle performance. In particular, when the coin cell is magnified to the pouch cell, it will be accompanied by some unpredictable problems. [6] For example, cell gassing, which is absolutely neglected in typical coin cells but turns into a new, inextricable problem in high-energy Li metal batteries. Gassing is a common phenomenon in other battery systems (such as lead-acid batteries, zinc-air batteries, and lithium titanate-based batteries) and has been studied in depth. [7] However, the gassing of Li metal batteries is often overlooked and has not attracted enough attention. It can be predicted that the gassing problem will be an inevitable topic in the future development of Li metal batteries. Generally, highly active Li metal reacts spontaneously with organic electrolyte to form an SEI layer. [8] Unfortunately, this passivated SEI film (commonly inhomogeneous, low modulus, and poor stability) hardly regulates uniform nucleation and growth of Li and suppresses interfacial parasitic reactions between Li metal and electrolyte, causing severe Li dendrites and gassing behavior, which have a considerable impact on the cycle life of high-energy Li metal batteries (Figure 1a). Hence, constructing a stable and cell-level SEI film to extend the cycle life in practical high-energy Li metal batteries is urgently needed.Here, we constructed an efficient multifunctional silanization interface (MSI) on the Li metal anode surface for highenergy Li metal pouch cells (Figure 1b). Contrasted with the original SEI film, MSI simultaneously possesses the properties of homogenizing Li-ion flux, high modulus, and high stability. The pouch cell assembled with the MSI protected Li metal anode (MSI-Li), high-area capacity LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode Lithium (Li) metal has attracted unprecedented attention as the ultimate anode material for future rechargeable batteries, but the electrochemical behavior (such as Li dendrites and gassing problems) in real Li metal pouch cells has received little attention. To achieve realistic high-energy Li metal batteries, the designed solid electrolyte interface to suppress both Li dendrites and catastrophic gassing problems is urgently needed at cell level. Here, an efficient multifunctional silanization interfac...

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Section: Resultsmentioning

confidence: 99%

Multifunctional Silanization Interface for High‐Energy and Low‐Gassing Lithium Metal Pouch Cells

Gao

Guo

Yuan

et al. 2019

Advanced Energy Materials

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“…These results clearly reveal that the HNCS provides favorable electrical conductivity and facilitates charge transfer. [40] Ac ontact angle of approximately 08 of the coated HNCS-separator toward the electrolyte (Figure S6 d, Supporting Information) implies the HNCS could facilitatet he surfacew ettability and reduce the electrolyte filling time. The galvanostatic discharge/charge profiles of Cell 1a td ifferent current rates (from 0.1C to 10.0 C) are presented in Figure 6a.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical N‐Rich Carbon Sponge with Excellent Cycling Performance for Lithium‐Sulfur Battery at High Rates

Zhen

Wang

et al. 2018

Chemistry A European J

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Lithium-sulfur batteries (LSBs) are receiving extensive attention because of their high theoretical energy density. However, practical applications of LSBs are still hindered by their rapid capacity decay and short cycle life, especially at high rates. Herein, a highly N-doped (≈13.42 at %) hierarchical carbon sponge (HNCS) with strong chemical adsorption for lithium polysulfide is fabricated through a simple sol-gel route followed by carbonization. Upon using the HNCS as the sulfur host material in the cathode and an HNCS-coated separator, the battery delivers an excellent cycling stability with high specific capacities of 424 and 326 mA h g and low capacity fading rates of 0.033 % and 0.030 % per cycle after 1000 cycles under high rates of 5 and 10 C, respectively, which are superior to those of other reported carbonaceous materials. These impressive cycling performances indicate that such a battery could promote the practical application prospects of LSBs.

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“…Although the energy density of ALIBs is lower than that of traditional LIBs, the advantages of high safety and low requirements for assembly environment make ALIBs more ideal for wearable applications . Other batteries systems such as sodium‐ion batteries (SIBs), lithium–sulfur (Li–S) batteries, zinc–manganese dioxide (Zn–MnO 2 ) batteries, nickel/iron (Ni/Fe) batteries, metal–air batteries, etc., also work on the basis of various chemical reactions rather than ion adsorption or fast surface redox reactions . The result is that batteries are more suitable for applications demanding more energy, while supercapacitors are more oriented to scenarios demanding more power.…”

Section: Design Basics Of Estsmentioning

confidence: 99%

Advances in Flexible and Wearable Energy‐Storage Textiles

Liu

et al. 2018

Small Methods

146

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Considerable attention has been drawn to flexible and wearable energy‐storage devices due to the blooming of portable and wearable electronics in recent years. However, huge challenges are yet to be addressed before the need of both high flexibility and high performance can be met. With many desired features for wearable applications, textiles have become a growing research frontier where scientific views from various fields collide, sparking new ideas. Here, recent research progress in energy‐storage textiles (ESTs), in which textiles are employed to enhance either electrochemical performance or flexibility and wearability, is summarized. The research of ESTs is mainly divided into three parts, with a focus on supercapacitors, lithium‐ion batteries (LIBs), and some other representative battery systems, respectively. Electrode preparation, cell assembly, device performance, and the remaining challenges are discussed in detail, aiming to provide insights for future development.

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Sulfur Nanodots Stitched in 2D “Bubble-Like” Interconnected Carbon Fabric as Reversibility-Enhanced Cathodes for Lithium–Sulfur Batteries

Cited by 90 publications

References 56 publications

Multifunctional Silanization Interface for High‐Energy and Low‐Gassing Lithium Metal Pouch Cells

Multifunctional Silanization Interface for High‐Energy and Low‐Gassing Lithium Metal Pouch Cells

Hierarchical N‐Rich Carbon Sponge with Excellent Cycling Performance for Lithium‐Sulfur Battery at High Rates

Advances in Flexible and Wearable Energy‐Storage Textiles

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