Ferromagnetic Nanoparticle–Assisted Polysulfide Trapping for Enhanced Lithium–Sulfur Batteries

Gao, Zan; Schwab, Yosyp; Zhang, Yunya; Song, Ningning; Li, Xiaodong

doi:10.1002/adfm.201800563

Cited by 128 publications

(53 citation statements)

References 60 publications

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“…Performance enhancement accompanied by electrochemical data indicating the improvement of the electrode kinetics was also achieved with further group 8-10 transition metals, such as the Pd 3 Co alloy (15 wt% nanoparticle additive), 360 iridium (10 wt% or 25 wt% nanoparticles on Ketjen black as a host or separator coating), 349 and iron (nanoparticles embedded in Ndoped CNFs mixed with graphene as a separator coating 387 and Fe/Fe 3 C nanoparticles with a graphene shell on a cotton textile as a host). 389 Zhang et al sputtered aluminum or titanium on the surfaces of sulfur/carbon electrodes to realize an improvement due to enhanced electrical conductivity, lled interspaces and related connement as well as improved electrode kinetics. 363 As seen in Table 6, aluminium provided for better results than titanium, which might also be related to the higher amount of deposited aluminium.…”

Section: The Role Of Metal Current Collectors In the Positive Electrodementioning

confidence: 99%

Metal-based nanostructured materials for advanced lithium–sulfur batteries

et al. 2018

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Since the resurgence of interest in lithium-sulfur (Li-S) batteries at the end of the 2000s, research in the field has grown rapidly. Li-S batteries hold great promise as the upcoming post-lithium-ion batteries owing to their notably high theoretical specific energy density of 2600 W h kg À1 , nearly five-fold larger than that of current lithium-ion batteries. However, one of their major technical problems is found in the shuttling of soluble polysulfides between the electrodes, resulting in rapid capacity fading and poor cycling stability. This review spotlights the foremost findings and the recent progress in enhancing the electrochemical performance of Li-S batteries by using nanoscaled metal compounds and metals. Based on an overview of reported functional metal-based materials and their specific employment in certain parts of Li-S batteries, the underlying mechanisms of enhanced adsorption and improved reaction kinetics are critically discussed involving both experimental and computational research findings. Thus, material design principles and possible interdisciplinary research approaches providing the chance to jointly advance with related fields such as electrocatalysis are identified. Particularly, we elucidate additives, sulfur hosts, current collectors and functional interlayers/hybrid separators containing metal oxides, hydroxides and sulfides as well as metalorganic frameworks, bare metal and further metal nitrides, metal carbides and MXenes. Throughout this review article, we emphasize the close relationship between the intrinsic properties of metal-based nanostructured materials, the (electro)chemical interaction with lithium (poly)sulfides and the subsequent effect on the battery performance. Concluding the review, prospects for the future development of practical Li-S batteries with metal-based nanomaterials are discussed. Fig. 2 (a) Stepwise reduction pathway of octet sulfur (S 8 ) to solid Li 2 S 2 and Li 2 S products, including intermediate LiPSs (Li 2 S n ; 3 # n # 8). 17 (b) Representative Li-S cell configuration and the characteristic charging/ discharging voltage profile based on the stoichiometric redox chemistry between lithium and sulfur. 22 (a) Reproduced with permission from ref. 17. View Article OnlineMass percentage of sulfur on the whole cathode excluding the Al or Ni substrate. c Capacity degradation rate is estimated from the gure since authors did not provide the specic value in the reference. d GO ¼ graphene oxide. e CNTs ¼ carbon nanotubes. f LiNO 3 -free electrolyte was used for the tested battery. g RFC ¼ resorcinol-formaldehyde carbon.This journal is Fig. 9 Some chosen studies dealing with cobalt sulfides in sulfur cathodes: (a) Galvanostatic cycling of a Co 9 S 8 /S (75 wt% S) composite. 200 (b) Galvanostatic cycling at 0.5C (within the 56 wt% S cathode) and (c) the capability to adsorb LiPSs of different carbon host materials with and w/o CoS 2 . 203 (d) SEM and TEM pictures of carbon/Co 3 S 4 polyhedra as a host material for sulfur and their electrochemical performanc...

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Section: The Role Of Metal Current Collectors In the Positive Electrodementioning

confidence: 99%

Metal-based nanostructured materials for advanced lithium–sulfur batteries

et al. 2018

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“…This shuttle effect could be mitigated by 1) trapping/confining the soluble LiPSs in the cathode by physical and chemical adsorption, [ 12–15 ] which prevents the transport of soluble LiPSs in the electrolyte, and 2) enhancing the kinetics of LiPS conversion reactions so that the soluble long‐chain LiPS could transform to insoluble short‐chain LiPS quickly, limiting the lifetime of soluble LiPS. [ 16,17 ] Therefore, a superior Li–S battery could be achieved by designing a cathode with high electrical conductivity (to facilitate electron transport), [ 18,19 ] a porous structure (to accommodate volume expansion), [ 9,20 ] strong polar affinity for LiPSs (to increase physiochemical adsorption), [ 18,21,22 ] and fast kinetics for LiPSs conversion (to accelerate the reaction kinetics). [ 23 ]…”

Section: Introductionmentioning

confidence: 99%

Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium–Sulfur Batteries

Sun

Vijay

Heenen

et al. 2020

Advanced Energy Materials

189

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involved, and affordable cost. [1][2][3] However, the commercial application of the sulfur cathode for the Li-S batteries is restrained by several technical barriers [4][5][6] compared with Li-ion battery. [7] First, the poor conductivity of sulfur and its reaction intermediates limit the sulfur utilization, [8] which leads to decreased energy density and power density. Second, during the charge/discharge process, there is a large volume change, resulting in rapid deterioration of the electrode structure. Various strategies have been investigated to increase electrode conductivity and to accommodate the volume expansion. [9][10][11] Last but not least, the dissolution and transport of lithium polysulfides (LiPSs) in the electrolyte result in the fatal "shuttle effect" that causes the deposition of Li 2 S on Li anode and then degrades the cycle performance. This shuttle effect could be mitigated by 1) trapping/confining the soluble LiPSs in the cathode by physical and chemical adsorption, [12][13][14][15] which prevents the transport of soluble LiPSs in the electrolyte, and 2) enhancing the kinetics of LiPS conversion reactions so that the soluble long-chain LiPS could transform to insoluble short-chain LiPS quickly, limiting the lifetime of soluble LiPS. [16,17] Therefore, a superior Li-S battery could be achieved by designing a cathode with high electricalThe lithium-sulfur (Li-S) battery is widely regarded as a promising energy storage device due to its low price and the high earth-abundance of the materials employed. However, the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox conversion result in inefficient sulfur utilization, low power density, and rapid electrode deterioration. Herein, these challenges are addressed with two strategies 1) increasing LiPS conversion kinetics through catalysis, and 2) alleviating the shuttle effect by enhanced trapping and adsorption of LiPSs. These improvements are achieved by constructing double-shelled hollow nanocages decorated with a cobalt nitride catalyst. The N-doped hollow inner carbon shell not only serves as a physiochemical absorber for LiPSs, but also improves the electrical conductivity of the electrode; significantly suppressing shuttle effect. Cobalt nitride (Co 4 N) nanoparticles, embedded in nitrogen-doped carbon in the outer shell, catalyze the conversion of LiPSs, leading to decreased polarization and fast kinetics during cycling. Theoretical study of the Li intercalation energetics confirms the improved catalytic activity of the Co 4 N compared to metallic Co catalyst. Altogether, the electrode shows large reversible capacity (1242 mAh g −1 at 0.1 C), robust stability (capacity retention of 658 mAh g −1 at 5 C after 400 cycles), and superior cycling stability at high sulfur loading (4.5 mg cm −2 ).

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“…The contradictionb etween energy shortage and demand has promoted the transformation of advanced energy storaged evices and energyc onversion technologies. [1] Amongavariety of rechargeable batteries, lithium-sulfur batteries have attracted extensive attention in the past few years. [2] Comparedw ith the mosta dvanced commercial lithium ion batteries, lithiumsulfur batteries not only have higher theoretical specific capacity (1672 mAh g À1 )a nd energy density (2600 Wh kg À1 ), but also have the advantages of low cost and environmental friendliness.…”

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confidence: 99%

Ferroelectric Metal–Organic Framework as a Host Material for Sulfur to Alleviate the Shuttle Effect of Lithium–Sulfur Battery

Zhu

Tao

Bao

et al. 2020

Chemistry A European J

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Ferroelectricity has an excellent reversible polarization conversion behavior under an external electric field. Herein, we propose an interesting strategy to alleviate the shuttle effect of lithium–sulfur battery by utilizing ferroelectric metal–organic framework (FMOF) as a host material for the first time. Compared to other MOF with same structure but without ferroelectricity and commercial carbon black, the cathode based on FMOF exhibits a low capacity decay and high cycling stability. These results demonstrate that the polarization switching behaviors of FMOF under the discharge voltage of lithium–sulfur battery can effectively trap polysulfides by polar–polar interactions, decrease polysulfides shuttle and improve the electrochemical performance of lithium–sulfur battery.

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Ferromagnetic Nanoparticle–Assisted Polysulfide Trapping for Enhanced Lithium–Sulfur Batteries

Cited by 128 publications

References 60 publications

Metal-based nanostructured materials for advanced lithium–sulfur batteries

Metal-based nanostructured materials for advanced lithium–sulfur batteries

Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium–Sulfur Batteries

Ferroelectric Metal–Organic Framework as a Host Material for Sulfur to Alleviate the Shuttle Effect of Lithium–Sulfur Battery

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