Blocking Polysulfides in Graphene–Sulfur Cathodes of Lithium–Sulfur Batteries through Atomic Layer Deposition of Alumina

Hong, Chulgi Nathan; Kye, Daniel Kyungbin; Mane, Anil U.; Elam, Jeffrey W.; Etacheri, Vinodkumar; Pol, Vilas G.

doi:10.1002/ente.201900621

Cited by 5 publications

(3 citation statements)

References 45 publications

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“…As mentioned earlier, the sonochemical synthesis method involves acoustic cavitation and results in local temperature/pressure increase [61]. This causes the in-situ reduction of sodium thiosulfate (Na 2 S 2 O 3 ) in aqueous media into elemental sulfur (S 0 ) in the form of sulfur nanoparticles [24,60]. Dilute hydrochloric acid and hydroxide/hydronium ions formed by the sonication of water molecules also aid the generation of elemental sulfur nanoparticles (Na 2 S 2 O 3 + 2HCl + H + + OH − → 2NaCl + H 2 O + S 0 + SO 2 ) [60].…”

Section: Synthesis and Characterization Of Graphene-cnt-nanosulfur Hybrid Cathodementioning

confidence: 99%

“…Ultrasound irradiation plays multiple roles in the demonstrated synthesis procedure. It is (1) essential to disperse the nanoplatelets in the aqueous reaction medium, (2) promote the reduction reaction of Na 2 S 2 O 3 to sulfur nanoparticles, and (3) partially exfoliate the multilayered graphene nanoplatelets to enable the intercalation of sulfur nanoparticles [24,60]. Multilayered graphene nanoplatelets are selected as the carbon matrix due to their inexpensive nature compared to single-layered graphene, high electronic conductivity, and possible intercalation of nanosulfur between the interlayers [67].…”

Section: Synthesis and Characterization Of Graphene-cnt-nanosulfur Hybrid Cathodementioning

confidence: 99%

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High-Performance Lithium Sulfur Batteries Based on Multidimensional Graphene-CNT-Nanosulfur Hybrid Cathodes

2021

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Although lithium-sulfur (Li-S) batteries are one of the promising candidates for next-generation energy storage, their practical implementation is limited by rapid capacity fading due to lithium polysulfide (LiPSs) formation and the low electronic conductivity of sulfur. Herein, we report a high-performance lithium-sulfur battery based on multidimensional cathode architecture consisting of nanosulfur, graphene nanoplatelets (2D) and multiwalled carbon nanotubes (1D). The ultrasonic synthesis method results in the generation of sulfur nanoparticles and their intercalation into the multilayered graphene nanoplatelets. The optimized multidimensional graphene-sulfur-CNT hybrid cathode (GNS58-CNT10) demonstrated a high specific capacity (1067 mAh g−1 @ 50 mA g−1), rate performance (539 @ 1 A g−1), coulombic efficiency (~95%) and cycling stability (726 mAh g−1 after 100 cycles @ 200 mA g−1) compared to the reference cathode. Superior electrochemical performances are credited to the encapsulation of nanosulfur between the individual layers of graphene nanoplatelets with high electronic conductivity, and effective polysulfide trapping by MWCNT bundles.

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Section: Synthesis and Characterization Of Graphene-cnt-nanosulfur Hybrid Cathodementioning

confidence: 99%

Section: Synthesis and Characterization Of Graphene-cnt-nanosulfur Hybrid Cathodementioning

confidence: 99%

High-Performance Lithium Sulfur Batteries Based on Multidimensional Graphene-CNT-Nanosulfur Hybrid Cathodes

2021

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“…Further advances are needed, however, to meet the energy densities and cycle lifetimes required for practical applications. Synergistic strategies such as active material coatings [13,14] and modified separators [15][16][17] have demonstrated efficacy, but come with the drawback of lower volumetric and gravimetric energy densities due to the inclusion of electrochemically inactive species.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Modified Carboxymethyl Cellulose as Advanced Polysulfide Trapping Binder

Gribble,

Pol

2023

Batteries

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The search for a high-energy-density alternative to lithium-ion batteries has led to great interest in the lithium sulfur battery (LSB). However, poor cycle lifetimes and coulombic efficiencies (CEs) due to detrimental lithium polysulfide (LiPS) shuttling has hindered its widespread adoption. To address this challenge, a modified sodium carboxymethyl cellulose (CMC) polymer with integrated dopamine moieties and polydopamine nanoparticles was created through a facile one-pot dopamine (DOP) amidation reaction to strengthen noncovalent interactions with LiPSs and mitigate the shuttling effect. The resulting CMC-DOP binder improved electrode wettability, adhesion, and electrochemical performance. Compared to LSBs with a standard CMC binder, CMC-DOP 5:1 (with a 5:1 weight ratio of CMC to dopamine precursor) improves the specific capacity at cycle 100 by 38% to 552 mAh g−1 and CE from 96.8 to 98.9%. LSBs show good stability, even after 500 cycles. Post-mortem electrochemical impedance spectroscopy (EIS) and energy-dispersive spectroscopy (EDS) studies confirmed the effectiveness of the CMC-DOP in confining LiPS in the cathode. This simple but effective nature-inspired strategy promises to enhance the viability of LSBs without using harmful chemicals or adding excess bulk.

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Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

et al. 2021

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Sulfur doping in carbonaceous materials is an effective approach to improve the performance of Li‐ion batteries (LIBs). Herein, sulfur‐implanted carbon dots‐embedded graphene (S‐CDs/rGO) as an anode material for LIBs is reported. A facile method is used to prepare S‐CDs/rGO by annealing the mixture of benzyl disulfide (BDS) and graphene oxide (GO). Herein, BDS serves as both the sulfur source and precursor of CDs. S‐CDs/rGO as an anode material for LIB delivers initial specific capacities of 938.8 mAh g−1 (first cycle) and 598.6 mAh g−1 (second cycle) at a current density of 100 mA g−1. S‐CDs/rGO exhibits superior cycling performance with good capacity retentions of 78.8% (500 cycles), 61.5% (2000 cycles), and 75.7% (2000 cycles) at higher current densities of 1000, 2000, and 3000 mA g−1, respectively. Moreover, the full cell assembly of the prepared S‐CDs/rGO as an anode and commercial LiFePO4 as a cathode in the voltage range of 1.5–3.9 V delivers a high reversible capacity of 203.3 mAh g−1 after extensive 1000 cycles at 500 mA g−1 with 51.8% retention (a low fading rate of 0.049% per cycle), rendering it as a promising anode material for application in high‐performance LIBs.

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Blocking Polysulfides in Graphene–Sulfur Cathodes of Lithium–Sulfur Batteries through Atomic Layer Deposition of Alumina

Cited by 5 publications

References 45 publications

High-Performance Lithium Sulfur Batteries Based on Multidimensional Graphene-CNT-Nanosulfur Hybrid Cathodes

High-Performance Lithium Sulfur Batteries Based on Multidimensional Graphene-CNT-Nanosulfur Hybrid Cathodes

Polydopamine-Modified Carboxymethyl Cellulose as Advanced Polysulfide Trapping Binder

Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

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