A Sulfur‐Rich Copolymer@CNT Hybrid Cathode with Dual‐Confinement of Polysulfides for High‐Performance Lithium–Sulfur Batteries

Abstract

A sulfur-rich copolymer@carbon nanotubes hybrid cathode is introduced for lithium-sulfur batteries produced by combining the physical and chemical confinement of polysulfides. The binderfree and metal-current-collector-free cathode of dual confinement enables an efficient pathway for the fabrication of high-performance sulfur copolymer carbon matrix electrodes for lithium-sulfur batteries.

Advances in Cathode Materials for High-Performance Lithium-Sulfur Batteries

“…With the aim to further improve cycling performance and promote practical application of LSBs, Hu et al. (Hu et al., 2016) fabricated a sulfur-1,3-diisopropenylbenzene@CNT (S-DIB@CNT) membrane hybrid cathode by combining the physical and chemical confinement strategies. The scanning electron micrograph of the as-prepared S-DIB@CNT hybrid is shown in Figure 20C.…”

“…This dual confinement strategy offers a new and efficient pathway for the fabrication of high-performance LSBs.

Figure 20Synthesis Strategy, Morphological Characterization, and Performance Investigations(A) Schematic diagram of the formation of PEG-CNT/S composite.(B) Cycling performance and Coulombic efficiencies of PCNT/S-1, P-CNT/S-2, and P-CNT/S-3 at 0.2 C. Reprinted with permission from (Li et al., 2016b). Copyright 2016, American Chemical Society.(C) Scanning electron micrograph of the as-prepared S-DIB@CNT hybrid.(D) Cycling performance of S@CNT and S-DIB@CNT hybrids at 1 C. Reprinted with permission from (Hu et al., 2016). Copyright 2016, Wiley-VCH.

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“…(D) Cycling performance of S@CNT and S-DIB@CNT hybrids at 1 C. Reprinted with permission from (Hu et al., 2016). Copyright 2016, Wiley-VCH.…”

Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries

“…Lithium-sulfur (Li-S) batteries are expected to perform a significant role in the field of energy storage owing to its ultrahigh theoretical energy density of 2500 Wh kg −1 , environmental friendliness, and low cost [12][13][14][15][16][17][18][19]. However, in practical applications, Li-S batteries are usually hindered by problems originating from the sulfur cathode, metallic lithium anode, and electrolyte [20][21][22][23].…”

“…However, in practical applications, Li-S batteries are usually hindered by problems originating from the sulfur cathode, metallic lithium anode, and electrolyte [20][21][22][23]. For the sulfur cathode, key problems mainly comprise three aspects: the low conductivity of sulfur and its discharge products, the diffusion of polysulfide ions, and the expansion of active material during electrochemical reaction [12][13][14][15][16][17][18][19][20][21][22][23]. To solve the abovementioned problems, one of the most effective methods is loading sulfur into electronically conductive frameworks with good structural stability [24][25][26][27][28][29][30][31][32].…”