A reinforced-concrete-like ultrathick cathode supported by carbonization kapok fibers for high loading lithium sulfur batteries

Ma, Jun; Xin, Yan; Zhang, Huan; Qu, Mei; Wei, Zhi Kai

doi:10.1016/j.matlet.2020.127312

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…To assess the practical viability of the ZnO/CNT@CFÀ Li anode, a full cell was assembled using a previously reported S@GNM2/CKFs material as the cathode. [34] CNT@CF/Li or ZnO/ CNT@CFÀ Li was used as the anode, and the S cathode loading was 8.0 mg cm À 2 . Analysis of the cycling stability (Figure 8a) and the typical charge-discharge profiles at the 1st cycle (Figure 8bc) indicated that CNT@CF/Li j S achieved an initial discharge capacity of 8.2 mAh cm À 2 , which decayed rapidly to 2.9 mAh cm À 2 after 143 cycles.…”

Section: Electrochemical Properties Of the 3d Zno/cnt@cf Skeleton And...mentioning

confidence: 99%

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A Freestanding 3D Skeleton with Gradationally Distributed Lithiophilic Sites for Realizing Stable Lithium Anodes

Li,

Zhou,

Liu

et al. 2023

Chemistry A European J

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Li metal anodes are drawing considerable attention owing to their ultrahigh theoretical capacities and low electrochemical reduction potentials. However, their commercialization has been hampered by safety hazards induced by continuous dendrite growth. These issues can be alleviated using the ZnO‐modified 3D carbon‐based host containing carbon nanotubes (CNTs) and carbon felt (CF) fabricated by electroplating in the present study (denoted as ZnO/CNT@CF); the constructed skeleton has lithiophilic ZnO that is gradationally distributed along its thickness. The utilization of an inverted ZnO/CNT@CF‐Li anode obtained by flipping over the carbon skeleton after Li electrodeposition is also reported herein. The synergistic effect of the Li metal and lithiophilic sites reduces the nucleation overpotential, thus inducing Li+ to preferentially deposit inside the porous carbon‐based scaffold. The composite electrode compels Li to grow away from the separator, thereby significantly improving battery safety. A symmetric cell with the inverted ZnO/CNT@CF‐Li electrode operates steadily for 700 cycles at 1 mA cm−2 and 1 mAh cm−2. Moreover, the ZnO/CNT@CF‐Li|S cell exhibits an initial areal capacity of 10.9 mAh cm−2 at a S loading of 10.4 mg cm−2 and maintains a capacity of 3.0 mAh cm−2 after 320 cycles.

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Section: Electrochemical Properties Of the 3d Zno/cnt@cf Skeleton And...mentioning

confidence: 99%

“…The inverted CNT@CF/Li anode structure was assembled using a composite electrode electrodeposited with Li metal on either side at the same capacity and current density (30 mAh cm À 2 and 1 mA cm À 2 ). Sulfur cathodes [34] (Chengdu Indigo Power Sources, China) were prepared to assemble the LiÀ S battery.…”

Section: Fabrication Of Zno/cnt@cf-li and Cnt@cf/limentioning

confidence: 99%

A Freestanding 3D Skeleton with Gradationally Distributed Lithiophilic Sites for Realizing Stable Lithium Anodes

Li,

Zhou,

Liu

et al. 2023

Chemistry A European J

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“…[22][23][24] Among them, the method of increasing electrode thickness can greatly increase the load of active materials and increase the proportion of active substances in the battery, so as to improve the energy density of the battery. [25][26][27] Recently, several studies have reported the enhanced sulfur loading, ranging from 8.22 [28] to 20 mg cm À2 , [29] for promoting the energy density of Li-S batteries. Nevertheless, up to now, the obtained batteries still demonstrated low energy density because of the unsatisfied sulfur loading.…”

Section: Introductionmentioning

confidence: 99%

General Construction of Ultrathick Sulfur Cathode for High‐Energy‐Density Lithium–Sulfur Battery

Zhang

Song

et al. 2023

Energy Tech

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Lithium–sulfur battery has high theoretical energy density (2600 Wh kg−1) and specific capacity (1675 mAh g−1), which is the research hotspot of next‐generation high‐energy‐density energy storage systems. In order to make the actual energy density of the battery closer to the theoretical value, it is necessary to increase the proportion of active substances as much as possible, but this will lead to the increase of the thickness of the electrode and affect the transport of ions inside the electrode. A new NH4HCO3 template to help solve the above problem is proposed. A large number of efficient ion transport channels are generated in ultrathick cathodes. The discharge capacity of the primary button battery reaches 1500 mAh g−1 at the rate of 0.005C. Meanwhile, the actual gravimetric and volumetric energy density of the primary pouch cell are 645 Wh kg−1 and 952 Wh L−1. The special cathode structure makes it easier for the electrolyte to penetrate the thick cathode, and makes the ion transport faster, which is the reason for the excellent performance of the battery. The work provides an effective way to improve the performance of high‐loaded sulfur cathode, enabling the commercialization of high‐specific energy Li–S batteries.

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Recent advances in the potential applications of hollow kapok fiber-based functional materials

Zheng

Wang

2021

Cellulose

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A reinforced-concrete-like ultrathick cathode supported by carbonization kapok fibers for high loading lithium sulfur batteries

Cited by 7 publications

References 9 publications

A Freestanding 3D Skeleton with Gradationally Distributed Lithiophilic Sites for Realizing Stable Lithium Anodes

A Freestanding 3D Skeleton with Gradationally Distributed Lithiophilic Sites for Realizing Stable Lithium Anodes

General Construction of Ultrathick Sulfur Cathode for High‐Energy‐Density Lithium–Sulfur Battery

Recent advances in the potential applications of hollow kapok fiber-based functional materials

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