Reaction heterogeneity in practical high-energy lithium–sulfur pouch cells

Shi, Libo; Bak, Seong‐Min; Shadike, Zulipiya; Wang, Chengqi; Niu, Chaojiang; Northrup, Paul; Lee, Hongkyung; Baranovskiy, Arthur Y.; Anderson, Christopher R.; Qin, Jian; Feng, Shuo; Ren, Xiaodi; Liu, Dianying; Yang, Xiao‐Qing; Gao, Fei; Lu, Dongping; Xiao, Jie; Li, Jun

doi:10.1039/d0ee02088e

Cited by 148 publications

(115 citation statements)

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“…[ 11–18 ] Furthermore, the development of a Li‐metal anode would facilitate other next‐generation high‐energy batteries, including Li–sulfur batteries and rechargeable Li–air batteries. [ 19–25 ]…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18] Furthermore, the development of a Li-metal anode would facilitate other next-generation high-energy batteries, including Li-sulfur batteries and rechargeable Li-air batteries. [19][20][21][22][23][24][25] Unfortunately, rechargeable Li-metal batteries (LMBs) have not been commercialized yet because the Li-metal anode still encounters great challenges. [26][27][28][29] High electrochemical performance of LMBs requires high-Coulombic-efficiency (CE), dendrite-free, and low-volume-expansion Li-metal anodes.…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress of Porous Materials in Lithium‐Metal Batteries

et al. 2021

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Lithium‐metal batteries (LMBs) are regarded as one of the best choices for next‐generation energy storage devices. However, the low Coulombic efficiency, lithium dendrite growth, and volume expansion of lithium‐metal anodes are dragging LMBs out of successful commercialization. Herein, the application of various porous materials in LMBs is focused on. First, several representative works are summarized to highlight the recent key progress of porous materials in LMBs, categorized into current collectors, thin 3D “hosts,” protection layers, and separators. Then, the existing challenges are discussed and future research needs to present more thorough characterizations of porous materials are advocated for, such as their porosity, electric conductivity, specific surface area, and mass density, to elaborate on their positive influence on electrochemical performance. Finally, future strategies with porous materials to build long‐cycle‐life, high‐energy‐density lithium‐metal full cells toward realistic performance targets are envisioned.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Progress of Porous Materials in Lithium‐Metal Batteries

et al. 2021

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“…[13,26] Importantly, recent studies reveal that the pouch cell failure may be mainly due to the Li anode degradation because of the "deep" cycling of Li metal, especially with a high S loading. [17,27] So far, most of the works on Li-S batteries focused mainly on the sulfur cathode, but didn't recognize the importance of the Li anode. This work provides useful insights that the full potential of Li-S full pouch cells can be unlocked by optimizing both the Li anode and sulfur cathode.…”

Section: Metal Electrochemical Plating/stripingmentioning

confidence: 99%

A Biomass‐Based Integral Approach Enables Li‐S Full Pouch Cells with Exceptional Power Density and Energy Density

et al. 2021

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Lithium-sulfur (Li-S) batteries, as part of the post-lithium-ion batteries (post-LIBs), are expected to deliver significantly higher energy densities. Their power densities, however, are today considerably worse than that of the LIBs, limiting the Li-S batteries to very few specific applications that need low power and long working time. With the rapid development of single cell components (cathode, anode, or electrolyte) in the last few years, it is expected that an integrated approach can maximize the power density without compromising the energy density in a Li-S full cell. Here, this goal is achieved by using a novel biomass porous carbon matrix (PCM) in the anode, as well as N-Co 9 S 8 nanoparticles and carbon nanotubes (CNTs) in the cathode. The authors' approach unlocks the potential of the electrodes and enables the Li-S full pouch cells with unprecedented power densities and energy densities (325 Wh kg −1 and 1412 W kg −1 , respectively). This work addresses the problem of low power densities in the current Li-S technology, thus making the Li-S batteries a strong candidate in more application scenarios.

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“…[17] Therefore,c onsidering these undesirable factors,i ti sn early impossible to further reduce the electrolyte volume of Li-S batteries to the LIBs level. [11] Most previous studies focused too heavily on the electrolyte volume,b ut neglected the electrolyte density,w hich is proportional to the electrolyte weight at af ixed electrolyte volume.H owever,t he density of conventional electrolyte (1 ML iTFSI in DME/DOL (1:1) with 2wt% LiNO 3 )i s approximately 1.2 gmL À1 ,even close to that of ester electrolyte ( % 1.3 gmL À1 ,1ML iPF 6 in EC/DMC 1:1). [10a] If al owdensity electrolyte is used instead of the conventional electrolyte,the electrolyte weight can be significantly lowered at the same E/S ratio.A ss hown in Figure 1b,a ssuming the electrolyte density is reduced from 1.2 to 0.8 gmL À1 under otherwise identical conditions,t he cell-level specific energy would increase by 24.4 %atE/S = 3 mLmg À1 ,30.5 %atE/S = 5 mLmg À1 ,and 34.3 %atE /S = 7 mLmg À1 .…”

Section: Introductionmentioning

confidence: 99%

Ultralight Electrolyte for High‐Energy Lithium–Sulfur Pouch Cells

Liu

Yue

et al. 2021

Angewandte Chemie

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The high weight fraction of the electrolyte in lithium-sulfur (Li-S) full cell is the primary reason its specific energy is muchb elowe xpectations.T hus far,i ti ss till ac hallenge to reduce the electrolyte volume of Li-S batteries owingt ot heir high cathode porosity and electrolyte depletion from the Li metal anode.H erein, we propose an ultralight electrolyte (0.83 gmL À1 )byintroducing aweakly-coordinating and Li-compatible monoether,w hich greatly reduces the weight fraction of electrolyte within the whole cell and also enables Li-S pouchc ell functionality under lean-electrolyte conditions.C ompared to Li-S batteries using conventional counterparts ( % 1.2 gmL À1 ), the Li-S pouchc ells equipped with our ultralight electrolyte could achieve an ultralow electrolyte weight/capacity ratio (E/C) of 2.2 gAh À1 and realize a1 9.2 %i mprovement in specific energy (from 329.9 to 393.4 Wh kg À1 )under E/S = 3.0 mLmg À1 .Moreover,more than 20 %i mprovement in specific energy could be achieved using our ultralight electrolyte at various E/S ratios.

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Reaction heterogeneity in practical high-energy lithium–sulfur pouch cells

Abstract: The lithium-sulfur (Li-S) battery is a promising next-generation energy storage technology because of its high theoretical energy and low cost. Extensive research efforts have been made on new materials and...

Cited by 148 publications

References 60 publications

Recent Progress of Porous Materials in Lithium‐Metal Batteries

Recent Progress of Porous Materials in Lithium‐Metal Batteries

A Biomass‐Based Integral Approach Enables Li‐S Full Pouch Cells with Exceptional Power Density and Energy Density

Ultralight Electrolyte for High‐Energy Lithium–Sulfur Pouch Cells

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