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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

邮发代号 80-969

2019 Impact Factor: 3.552

Frontiers of Chemical Science and Engineering  2020, Vol. 14 Issue (6): 976-987   https://doi.org/10.1007/s11705-019-1897-x
  本期目录
Kombucha SCOBY-based carbon and graphene oxide wrapped sulfur/polyacrylonitrile as a high-capacity cathode in lithium-sulfur batteries
Krishnaveni Kalaiappan1, Subadevi Rengapillai1, Sivakumar Marimuthu1(), Raja Murugan2, Premkumar Thiru2
1. Energy Materials Lab, Department of Physics, Science Block, Alagappa University, Karaikudi, 630003 Tamil Nadu, India
2. Electrochemical Power Systems Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003 Tamil Nadu, India
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Abstract

Hierarchically-porous carbon nano sheets were prepared as a conductive additive for sulfur/polyacrylonitrile (S/PAN) composite cathodes using a simple heat treatment. In this study, kombucha (that was derived from symbiotic culture of bacteria and yeast) carbon (KC) and graphene oxide (GO) were used as a carbon host matrix. These rational-designed S/PAN/KC/GO hybrid composites greatly suppress the diffusion of polysulfides by providing strong physical and chemical adsorption. The cathode delivered an initial discharge capacity of 1652 mAh·g−1 at a 0.1 C rate and a 100th cycle capacity of 1193 mAh·g−1. The nano sheets with embedded hierarchical pores create a conductive network that provide effective electron transfer and fast electrochemical kinetics. Further, the nitrogen component of PAN can raise the affinity/interaction of the carbon host with lithium polysulfides, supporting the cyclic performance. The results exploit the cumulative contribution of both the conductive carbon matrix and PAN in the enhanced performance of the positive electrode.

Key wordssulfur cathode    kombucha SCOBY    graphene oxide    polyacrylonitrile    lithium-sulfur battery
收稿日期: 2019-05-12      出版日期: 2020-09-11
Corresponding Author(s): Sivakumar Marimuthu   
 引用本文:   
. [J]. Frontiers of Chemical Science and Engineering, 2020, 14(6): 976-987.
Krishnaveni Kalaiappan, Subadevi Rengapillai, Sivakumar Marimuthu, Raja Murugan, Premkumar Thiru. Kombucha SCOBY-based carbon and graphene oxide wrapped sulfur/polyacrylonitrile as a high-capacity cathode in lithium-sulfur batteries. Front. Chem. Sci. Eng., 2020, 14(6): 976-987.
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https://academic.hep.com.cn/fcse/CN/10.1007/s11705-019-1897-x
https://academic.hep.com.cn/fcse/CN/Y2020/V14/I6/976
Sample C/mol-% H/mol-% N/mol-% S/mol-%
S/PAN/KC 37.43 0.86 4.82 40.28
S/PAN/GO 37.10 1.00 4.40 52.42
S/PAN/KC/GO 37.5 0.6 5.8 55.4
Tab.1  
Fig.1  
Fig.2  
Fig.3  
Fig.4  
Fig.5  
Fig.6  
Fig.7  
No. Cathode materials Initial discharge capacity/(mAh·g?1) C rate Capacity(nth cycle)/(mAh·g?1) Capacity retention Ref.
1 S/CPAN-800 1585 0.1 862(100) 54.3 [57]
2 S/PPNC-650 1357.8 0.1 729(100) 53.6 [58]
3 S/PAN/AB 1330 0.1 571(50) 42.9 [36]
4 S/CNT@rGO 1299 0.2 670(100) 51.5 [59]
5 HPNC-S 834 0.2 520(300) 62.3 [12]
6 S/PCNS 1600 0.1 554(50) 34.6 [60]
7 S/ACF 1258 0.2 750(100) 59.6 [61]
8 BHPC-850 1265 643(50) 50.8 [62]
9 PAN/S/AB 1380 0.1 620(50) 44.6 [39]
10 CCS 1318 0.5 811(100) 61.5 [63]
11 S/HPC 1377 0.1 753 54.6 [64]
12 S/HPCNF 1198 0.2 620(100) 51.7 [65]
13 S/HPC(poplar catkin) 1318 0.1 850(100) 64.4 [66]
14 AB/S@G 1603.5 0.1 824.6(100) 51.4 [67]
15 NanoS@G 1400 0.2 720(100) 51.4 [68]
16 NOPC/S 1185.4 0.2 757.9(100) 63.9 [69]
17 S/PAN/KC/GO 1652 0.1 1193(100) 72.2 This work
Tab.2  
Fig.8  
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