Boosting Li–S battery by rational design of freestanding cathode with enriched anchoring and catalytic N-sites carbonaceous host

Bian, Zihao; Yuan, Tao; Xu, Ying; Pang, Yuepeng; Yao, Hongfei; Li, Jing; Yang, Jing; Zheng, Shiyou

doi:10.1016/j.carbon.2019.05.022

Cited by 44 publications

(18 citation statements)

References 72 publications

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“…CV profiles at varied scanning rate from 0.1 to 0.5 mV s −1 . The D Li + is correlated to the fitted slope based on the Randles–Sevcik diffusion equation [ 31 ]

I_{normalP} = (2.69 \times 10^{5}) n^{1.5} a D_{normalLi}^{0.5} v^{0.5} C_{normalLi}

where I p corresponds to the peak current, n refers to the number of electrons transferred in the redox event, a is the active area of the electrode, D presents the Li + diffusion coefficient, υ is the scan rate, and C Li refers to the Li + concentration in electrolyte.…”

Section: Methodsmentioning

confidence: 99%

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Qiu

Luo

et al. 2021

Advanced Science

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Rational construction of sulfur electrodes is essential in pursuit of practically viable lithium-sulfur (Li-S) batteries. Herein, bimetallic NiCo-layered double hydroxide (NiCo-LDH) with a unique hierarchical micro-nano architecture is developed as an advanced sulfur reservoir for Li-S batteries. Compared with the monometallic Co-layered double hydroxide (Co-LDH) counterpart, the bimetallic configuration realizes much enriched, miniaturized, and vertically aligned LDH nanosheets assembled in hollow polyhedral nanoarchitecture, which geometrically benefits the interface exposure for host-guest interactions. Beyond that, the introduction of secondary metal intensifies the chemical interactions between layered double hydroxide (LDH) and sulfur species, which implements strong sulfur immobilization and catalyzation for rapid and durable sulfur electrochemistry. Furthermore, the favorable NiCo-LDH is architecturally upgraded into closely packed micro-nano clusters with facilitated long-range electron/ion conduction and robust structural integrity. Due to these attributes, the corresponding Li-S cells realize excellent cyclability over 800 cycles with a minimum capacity fading of 0.04% per cycle and good rate capability up to 2 C. Moreover, highly reversible areal capacity of 4.3 mAh cm −2 can be achieved under a raised sulfur loading of 5.5 mg cm −2. This work provides not only an effective architectural design but also a deepened understanding on bimetallic LDH sulfur reservoir for high-performance Li-S batteries.

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“…CV profiles at varied scanning rate from 0.1 to 0.5 mV s −1 . The D Li + is correlated to the fitted slope based on the Randles–Sevcik diffusion equation [ 31 ]

I_{normalP} = (2.69 \times 10^{5}) n^{1.5} a D_{normalLi}^{0.5} v^{0.5} C_{normalLi}

Section: Methodsmentioning

confidence: 99%

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Qiu

Luo

et al. 2021

Advanced Science

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“…In this work, porous g-C 3 N 4 nanotubes (PCNNTs) were prepared by a self-template method using a melamine sponge as the raw material [24]. PCNNTs with tubular and mesoporous structures feature a larger interspace for sulfur.…”

Section: Introductionmentioning

confidence: 99%

High-performance lithium-sulfur battery based on porous N-rich g-C3N4 nanotubes via a self-template method

Gao

Zhang

et al. 2021

Int J Miner Metall Mater

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The commercial development of lithium -sulfur batteries (Li -S) is severely limited by the shuttle effect of lithium polysulfides (LPSs) and the non-conductivity of sulfur. Herein, porous g-C 3 N 4 nanotubes (PCNNTs) are synthesized via a self-template method and utilized as an efficient sulfur host material. The one-dimensional PCNNTs have a high specific surface area (143.47 m 2 •g −1 ) and an abundance of macro-/mesopores, which could achieve a high sulfur loading rate of 74.7wt%. A Li-S battery bearing the PCNNTs/S composite as a cathode displays a low capacity decay of 0.021% per cycle over 800 cycles at 0.5 C with an initial capacity of 704.8 mAh•g −1 . PCNNTs with a tubular structure could alleviate the volume expansion caused by sulfur and lithium sulfide during charge/discharge cycling. High N contents could greatly enhance the adsorption capacity of the carbon nitride for LPSs. These synergistic effects contribute to the excellent cycling stability and rate performance of the PCNNTs/S composite electrode.

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“…Bian et al took multi-functional porous carbon nanofibers (g-C 3 N 4 @PCNF) as the sulfur host, in which g-C 3 N 4 contributed to rapid oxidation-remediation conversion of S species and slowed down LiPS yield. Consequently, the g-C 3 N 4 @PCNF/S cathode achieves good flexibility and excellent cycling retention, e.g., long cycling with decay power of only 0.056% per cycle for 500 cycles at 1.0 A g −1 (Bian et al, 2019). In addition, Lee and coworkers have demonstrated that catalytic activity in anoxic sites is higher than in saturated sites as the oxygen vacancy can contribute to the transformation of electrons and the formation of S 3− radicals (Lin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

β-FeOOH Interlayer With Abundant Oxygen Vacancy Toward Boosting Catalytic Effect for Lithium Sulfur Batteries

Hao

et al. 2020

Front. Chem.

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Due to the shuttle effect and low conductivity of sulfur (S), it has been challenging to realize the application of lithium-sulfur (Li-S) batteries with high performance and long cyclability. In this study, a high catalytic active CNTs@FeOOH composite is introduced as a functional interlayer for Li-S batteries. Interestingly, the existence of oxygen vacancy in FeOOH functions electrocatalyst and promotes the catalytic conversion of intercepted lithium polysulfides (LiPS). As a result, the optimized CNTs@FeOOH interlayer contributed to a high reversible capacity of 556 mAh g −1 at 3,200 mA g −1 over 350 cycles. This study demonstrates that enhanced catalytic effect can accelerate conversion efficiency of polysulfides, which is beneficial of boosting high performance Li-S batteries.

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Boosting Li–S battery by rational design of freestanding cathode with enriched anchoring and catalytic N-sites carbonaceous host

Cited by 44 publications

References 72 publications

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

High-performance lithium-sulfur battery based on porous N-rich g-C3N4 nanotubes via a self-template method

β-FeOOH Interlayer With Abundant Oxygen Vacancy Toward Boosting Catalytic Effect for Lithium Sulfur Batteries

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