Chemical tailoring of one-dimensional polypyrene nanocapsules at a molecular level: towards ideal sulfur hosts for high-performance Li–S batteries

Xiao, Zhichang; Xu, Xiaohui; Kong, Debin; Liang, Jiaxu; Zhou, Shanke; Huang, Xiaoxiong; Yang, Qi; Zhi, Linjie

doi:10.1039/c8ta11588e

Cited by 13 publications

(6 citation statements)

References 58 publications

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“…In parallel, several studies have reported the use of condensed/conjugated aromatic structure of pyrene (i.e., crystalline pyrene, noncrystalline oligopyrene, and polypyrene), pyrenediimide-based π-conjugated copolymer, pyrene-based derivatives, and its nanocomposites with carbon matrix. These are promising highly reversible and high-capacity electrode materials that can be used in various electrical energy-storage applications, such as organic LIBs and sodium-ion batteries, , electrochemical energy-storage devices, , lithium–sulfur (Li–S) batteries, and rechargeable aluminum batteries . Inspired by these results, we proposed utilizing only a few condensed aromatic rings/extended π-conjugated aromatic rings to emulate the cathodic behavior of greatly condensed polyaromatic graphite/graphene structures .…”

Section: Introductionmentioning

confidence: 99%

Large π-Conjugated Condensed Perylene-Based Aromatic Polyimide as Organic Cathode for Lithium-Ion Batteries

Raj

Mangalaraja

Lee

et al. 2020

ACS Appl. Energy Mater.

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Organic redox-active compounds are promising alternatives to traditional inorganic analogs in organic batteries owing to their high energy density and tunable redox potentials. However, their poor cycling stability due to undesired dissolution in electrolytes and low electronic conductivity limit their applications. Herein, we report the large π-conjugated condensed aromatic structures/extended π-conjugation of perylene-based aromatic polyimide (namely, 5,12-bis(pyren-1-ylamino)perylenediimide– hydrazine, BA-PI) as cathode for use in lithium-ion batteries. This cathode is synthesized by one-step polymerization reaction between the aminopyrene-substituted at the 1,7-bay area of perylene-3,4:9,10-tetracarboxylic dianhydride (PTCDA) unit and hydrazine hydrate. The half-cell battery employing BA-PI exhibits an initial discharge capacity of ∼51 mAh g–1 in the potential range of 1.5–3.5 V vs Li+/Li, which is ∼78% of its theoretical value (∼65.46 mAh g–1). Further, a different BA-PI-based cell delivers initial discharge capacity of ∼85 mAh g–1. When the deep-discharging to 0.01 V vs Li+/Li (at the very low voltage of <1.5 V), about 34 Li+ ions can be incorporated into a BA-PI electrode on copper foil as a current collector, exhibiting an extremely high specific capacity of ∼1096 mAh g–1. Moreover, the non-bay-substituted perylene-based aromatic polyimide, as control cathode, has delivered a discharge capacity of ∼129 mAh g–1 and shows good cyclic stability, indicating that such perylene-based aromatic polyimides are promising organic cathode materials for high-capacity lithium–polyimide batteries.

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Section: Introductionmentioning

confidence: 99%

Large π-Conjugated Condensed Perylene-Based Aromatic Polyimide as Organic Cathode for Lithium-Ion Batteries

Raj

Mangalaraja

Lee

et al. 2020

ACS Appl. Energy Mater.

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“…图 1 先进碳基复合储硫载体的三功能化设计与应用 Figure 1 Tri-functional design and application of an advanced carbonbased composite sulfur storage host 3.1 单功能导电碳基储硫正极的研究进展提升碳基材料的石墨化程度, 优化材料的空间形貌 (如形成三维交联互通的空间网络), 构建杂原子掺杂 (N/P/S)均能够有助于电子的快速定向输运, 可以显著提升碳基材料的储硫性能 [41,[43][44][45][46][47][48] . 2009 年 Nazar 课题组 [6] 设计出一种高度有序的介孔碳管, 通过浸渍将硫熔融渗透进入一维介孔碳管(CMK-3)中, 利用高度有序的介孔碳与硫正极的充分浸润, 实现了一维碳基材料在锂-硫电池中的可逆循环, 100 个周期后依然具有 390 mAh•g −1 的放电容量.…”

Section: 功能碳基复合材料储硫正极的研究进展unclassified

“…相比单一介孔碳-硫正极, 该复合正极具有更稳定的循环能力. 为了进一步提升锂硫电池的首圈容量低的问题, Zhi 和 Xiao [48] 首先设计出具有"胶囊"形貌的硫正极载体, 通过精确调控胶囊壁的直径和孔的分布, 增大硫与载体的接触表面积, 并利用高的孔隙率实现载体的高硫负载(质量分数 76%). 基于碳基材料几何结构的优化, 该复合正极在 0.5 C 的电流密度下将首圈放电容量提升至 1165 mAh•g −1 .…”

Section: 功能碳基复合材料储硫正极的研究进展unclassified

Functionalized Carbon-Based Composite Materials for Cathode Application of Lithium-Sulfur Batteries

Liu¹,

Jia²,

Zhu³

et al. 2022

Acta Chimica Sinica

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Carbon-based materials exhibit excellent physical and chemical properties due to their diverse structure, adjustable morphology and controllable composition. They have great application potentials in the field of new energy storage and conversion. Lithium-sulfur batteries as a kind of important new energy storage devices are trapped by the sulfur and lithium sulfide bottleneck of electronic insulation, which leads to irreversible charging and discharging processes. Fortunately, carbon-based composite materials have strong electrical conductivity. The coupling of multi-functions of the composite materials can improve the long-term utilization of sulfur and alleviate the attenuation of cycle and rate capacity. Functionalized carbon-based composite materials can be prepared through surface/interface and defect engineering techniques, which have attracted the attention and favor of scientific researchers. We review the preparation methods of functionalized carbon-based host materials and analyze the structure-function relationship of carbon-based composite materials and sulfur cathodes. We discuss the influence of the change of morphology, structure, and composition on the electrochemical performance of sulfur cathode. Finally, the feasibility of the functionalized carbon-based composite materials are prospected in the practical application of the lithium-sulfur battery.

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“…Through a series of approaches, it is expected to achieve overall improvements of a Li-S battery. As a specific application case, Xiao's group reported that porous carbon nanocapsules (PCNC) derived from one-dimensional polypyrene with closed configuration and high conductivity are ideal sulfur hosts for Li−S batteries (Figure 1M) (Xiao et al, 2019). This polypyrene with a well cross-linked framework is rich in porosity and large internal void space that will be preserved after pyrolysis.…”

Section: Conductive Polymersmentioning

confidence: 99%

Progress and Prospect of Organic Electrocatalysts in Lithium−Sulfur Batteries

Dong

Cai

et al. 2021

Front. Chem.

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Lithium−sulfur (Li−S) batteries featured by ultra-high energy density and cost-efficiency are considered the most promising candidate for the next-generation energy storage system. However, their pragmatic applications confront several non-negligible drawbacks that mainly originate from the reaction and transformation of sulfur intermediates. Grasping and catalyzing these sulfur species motivated the research topics in this field. In this regard, carbon dopants with metal/metal-free atoms together with transition–metal complex, as traditional lithium polysulfide (LiPS) propellers, exhibited significant electrochemical performance promotions. Nevertheless, only the surface atoms of these host-accelerators can possibly be used as active sites. In sharp contrast, organic materials with a tunable structure and composition can be dispersed as individual molecules on the surface of substrates that may be more efficient electrocatalysts. The well-defined molecular structures also contribute to elucidate the involved surface-binding mechanisms. Inspired by these perceptions, organic electrocatalysts have achieved a great progress in recent decades. This review focuses on the organic electrocatalysts used in each part of Li−S batteries and discusses the structure–activity relationship between the introduced organic molecules and LiPSs. Ultimately, the future developments and prospects of organic electrocatalysts in Li−S batteries are also discussed.

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Chemical tailoring of one-dimensional polypyrene nanocapsules at a molecular level: towards ideal sulfur hosts for high-performance Li–S batteries

Abstract: A novel 1D porous carbon nanocapsule (PCNC) has been successfully fabricated by heat treatment of the in situ synthesized polypyrene nanocapsule, where the diameter of the capsule wall can be easily tuned.

Cited by 13 publications

References 58 publications

Large π-Conjugated Condensed Perylene-Based Aromatic Polyimide as Organic Cathode for Lithium-Ion Batteries

Large π-Conjugated Condensed Perylene-Based Aromatic Polyimide as Organic Cathode for Lithium-Ion Batteries

Functionalized Carbon-Based Composite Materials for Cathode Application of Lithium-Sulfur Batteries

Progress and Prospect of Organic Electrocatalysts in Lithium−Sulfur Batteries

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