Interface Synergistic Effect from Layered Metal Sulfides of MoS2/SnS2 van der Waals Heterojunction with Enhanced Li-Ion Storage Performance

被引：38

作者：

Man, Xiaolei ^{[1
]}

Liang, Pei ^{[1
]}

Shu, Haibo ^{[1
]}

Zhang, Lin ^{[1
]}

Wang, Dan ^{[1
]}

Chao, Dongliang ^{[2
]}

Liu, Zugang ^{[1
]}

Du, Xiaoqing ^{[3
]}

Wan, Houzhao ^{[4
]}

Wang, Hao ^{[4
]}

机构：

[1] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Zhejiang, Peoples R China

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[3] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China

[4] Hubei Univ, Fac Phys & Elect Sci, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 43期

基金：

美国国家科学基金会;

关键词：

REDUCED GRAPHENE OXIDE; LITHIUM-ION; ANODE MATERIAL; BATTERY ANODE; ELECTROCHEMICAL PERFORMANCE; HIGH-CAPACITY; CYCLE LIFE; MOS2; COMPOSITES; SNS2;

D O I：

10.1021/acs.jpcc.8b09225

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Layered metal sulfides (LMSs) with larger interlayer spacing are suitable for Li+ intercalation/extraction and possess relatively higher theoretical specific capacity than commercial graphite. However, pure LMSs show inherent low conductivity and irreversible huge volume expansion in lithium uptakes. In this work, we introduce an interesting van der Waals heterojunction between two popular LMSs, i.e., MoS2/SnS2 van der Waals heterojunction grown on reduced graphene oxide (MoS2/SnS2-rGO), which is synthesized by a facile hydrothermal process. The MoS2/SnS2-rGO nanocomposite exhibits a remarkable interface synergistic effect due to the weak van der Waals interaction on their nanocrystalline, which leads to an enhanced energy storage performance compared with MoS2-rGO and SnS2-rGO. The MoS2/SnS2-rGO exhibits better cycling stability of 894 mAh g(-1) at 200 mA after 55 cycles and excellent rate performance of 590 mAh g(-1) at 1 A g(-1) for LIBs. This work proposes that weaker van der Waals interactions between the LMS can induce much more layer space for Li+ in LIBs, which might be another way to improve the storage performance of LIBs.

引用

页码：24600 / 24608

页数：9