Freestanding agaric-like molybdenum carbide/graphene/N-doped carbon foam as effective polysulfide anchor and catalyst for high performance lithium sulfur batteries

Niu，Shuzhang1,2,3; Zhang，Si Wei4; Shi，Run1; Wang，Jingwei1; Wang，Weijun1; Chen，Xiaomei1; Zhang，Zhuoqiong1; Miao，Jun1; Amini，Abbas5; Zhao，Yusheng2,3; Cheng，Chun1,2,3

2020-12-01

10.1016/j.ensm.2020.05.033

Energy Storage Materials   影响因子和分区

2405-8297

2405-8297

Developing high energy density lithium-sulfur (Li–S) batteries mainly relies on the design of the electrode matrix which can accommodate high sulfur loading and still remain high utilization of active materials. Herein, a 3D hierarchical graphitic carbon foam supported graphene@MoC (GCF-G@MoC) heterostructure is introduced as a freestanding electrode for Li–S batteries with a facile and cost-effective method. The N-doped carbon foam wrapped by graphene sheets with agaric-like porous structure could promote fast electron and ion transport, meanwhile effectively anchor the polysulfides through physical confinement and chemical adsorption by strongly polar-polar interactions. More importantly, the MoC nanoparticles can act as the chemical anchoring center to provide strong polysulfide adsorption, as testified by experimental data and first-principle calculations. Moreover, the catalytic effect of MoC also accelerates the redox kinetics of polysulfide conversion, contributing to enhanced rate performance. As a result, the cell with GCF-G@MoC displays an initial capacity as high as 862 mAh g and a retained capacity of 597 mAh g after 600 cycles with only 0.051% capacity fade per cycle at 1C rate, presenting good cycling stability. In addition, the GCF-G@MoC substrate with high sulfur content (70 ​wt%) and sulfur loading (10.5 ​mg ​cm) achieves an ultra-high areal capacity of 12.6 mAh cm at 0.1 ​C, offering a competitive cathode for high-performance Li–S batteries.

Agaric-like structure High catalytic activity High loading cathodes Lithium-sulfur batteries Mo2C nanoparticles

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[51972161,51702182,51776094] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515011805] ; Fundamental Research Project from Shenzhen Science and Technology Innovation Committee["JCYJ20190809115407617","JCYJ20180302174021198"] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Guangdong High-level Personnel of Special Support Program-Outstanding young scholar in science and technology innovation[2015TQ01C543] ; Shenzhen Knowledge Innovation Program-Basic Research (Discipline Layout) Project[JCYJ20180504165655180]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000598789700008

ELSEVIER

20203409064521

Catalyst activity ; Cost effectiveness ; Lithium sulfur batteries ; Molybdenum compounds ; Carbides ; Foams ; Graphene ; Lithium batteries ; Nanoparticles ; Doping (additives) ; Polysulfides

Primary Batteries:702.1.1 ; Secondary Batteries:702.1.2 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Ceramics:812.1 ; Organic Polymers:815.1.1 ; Synthetic Rubber:818.2.1 ; Industrial Economics:911.2 ; Solid State Physics:933

2-s2.0-85089416414

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
3.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology,Shenzhen,518055,China
4.Tsinghua-Berkeley Shenzhen Institute (TBSI),Tsinghua University,Shenzhen,518055,China
5.Center for Infrastructure Engineering,Western Sydney University,Kingwood,2751,Australia

Niu，Shuzhang,Zhang，Si Wei,Shi，Run,et al. Freestanding agaric-like molybdenum carbide/graphene/N-doped carbon foam as effective polysulfide anchor and catalyst for high performance lithium sulfur batteries[J]. Energy Storage Materials,2020,33:73-81.

Niu，Shuzhang.,Zhang，Si Wei.,Shi，Run.,Wang，Jingwei.,Wang，Weijun.,...&Cheng，Chun.(2020).Freestanding agaric-like molybdenum carbide/graphene/N-doped carbon foam as effective polysulfide anchor and catalyst for high performance lithium sulfur batteries.Energy Storage Materials,33,73-81.

Niu，Shuzhang,et al."Freestanding agaric-like molybdenum carbide/graphene/N-doped carbon foam as effective polysulfide anchor and catalyst for high performance lithium sulfur batteries".Energy Storage Materials 33(2020):73-81.