TY - JOUR
T1 - A Dual-Function Na2SO4 Template Directed Formation of Cathode Materials with a High Content of Sulfur Nanodots for Lithium–Sulfur Batteries
AU - Luo, Chong
AU - Lv, Wei
AU - Deng, Yaqian
AU - Zhou, Guangmin
AU - Pan, Zheng Ze
AU - Niu, Shuzhang
AU - Li, Baohua
AU - Kang, Feiyu
AU - Yang, Quan Hong
N1 - Funding Information:
The authors appreciate support from the National Natural Science Foundation of China (Nos. U1601206, 51525204, 51372167, and U1401243), the National Basic Research Program of China (2014CB932400), and the Shenzhen Basic Research Project (Nos. ZDSYS20140509172959981, JCYJ20150529164918734, JCYJ20150331151358140, and JCYJ20150331151358136).
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/7/19
Y1 - 2017/7/19
N2 - The sulfur content in carbon–sulfur hybrid using the melt-diffusion method is normally lower than 70 wt%, which greatly decreases the energy density of the cathode in lithium–sulfur (Li-S) batteries. Here, a scalable method inspired by the commercialized production of Na2S is used to prepare a hierarchical porous carbon–sulfur hybrid (denoted HPC-S) with high sulfur content (≈85 wt%). The HPC-S is characterized by the structure of sulfur nanodots naturally embedded in a 3D carbon network. The strategy uses Na2SO4 as the starting material, which serves not only as the sulfur precursor but also as a salt template for the formation of the 3D carbon network. The HPC-S cathode with such a high sulfur content shows excellent rate performance and cycling stability in Li–S batteries because of the sulfur nanoparticles, the unique carbon framework, and the strong interaction between them. The production method can also be readily scaled up and used in practical Li–S battery applications.
AB - The sulfur content in carbon–sulfur hybrid using the melt-diffusion method is normally lower than 70 wt%, which greatly decreases the energy density of the cathode in lithium–sulfur (Li-S) batteries. Here, a scalable method inspired by the commercialized production of Na2S is used to prepare a hierarchical porous carbon–sulfur hybrid (denoted HPC-S) with high sulfur content (≈85 wt%). The HPC-S is characterized by the structure of sulfur nanodots naturally embedded in a 3D carbon network. The strategy uses Na2SO4 as the starting material, which serves not only as the sulfur precursor but also as a salt template for the formation of the 3D carbon network. The HPC-S cathode with such a high sulfur content shows excellent rate performance and cycling stability in Li–S batteries because of the sulfur nanoparticles, the unique carbon framework, and the strong interaction between them. The production method can also be readily scaled up and used in practical Li–S battery applications.
KW - dual-function templates
KW - hierarchical porous carbon frameworks
KW - lithium–sulfur batteries
KW - sulfur nanodots
UR - http://www.scopus.com/inward/record.url?scp=85019939606&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019939606&partnerID=8YFLogxK
U2 - 10.1002/smll.201700358
DO - 10.1002/smll.201700358
M3 - Article
C2 - 28544446
AN - SCOPUS:85019939606
VL - 13
JO - Small
JF - Small
SN - 1613-6810
IS - 27
M1 - 1700358
ER -