Dendrite-Free lithium electrode enabled by graphene aerogels with gradient porosity

Huang，Wei1; Yu，Yikang2; Hou，Zhen2; Liang，Zhuojian1; Zheng，Yiyi2; Quan，Zewei2; Lu，Yi Chun1

2020-12-01

10.1016/j.ensm.2020.08.032

Energy Storage Materials   影响因子和分区

2405-8297

2405-8297

Lithium metal is the most attractive anode material owing to its lowest electrochemical potential and high theoretical specific capacity. However, uncontrolled dendrite growth leads to severe safety issues and poor electrochemical stability, hindering its practical application. Herein, we report a dendrite-free and reversible Li metal anode enabled by graphene aerogel (GA) host with three-dimensional gradient porous structure. The gradient porous structure facilitates reversible Li plating/stripping with high Li/carbon mass ratio (Li/C = 5) and realizes uniform Li distribution on the electrode surface. This approach achieves a stable voltage profile for a long lifespan (1300 h at 2 mA cm for 2 mAh cm and 1000 h at 5 mA cm for 3 mAh cm) with superior high symmetric cumulative capacity (2500 mAh cm). Coupling the LiGA anode with a LiFePO (LFP) cathode, a stable cycling of the full LiGA-LFP cells for 200 cycles at 2 C were achieved, demonstrating the promising practical applications of LiGA in advanced rechargeable batteries.

Cumulative capacity Dendrite-free Gradient porous structure Graphene aerogel Lithium metal anode

SCI ; EI

英语

通讯

Research Grants Council of the Hong Kong SAR, China under Joint Research Scheme NSFC/RGC[N_CUHK435/18]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000599505100001

ELSEVIER

20203709159684

Graphene ; Lithium batteries ; Lithium ; Aerogels ; Lithium compounds ; Iron compounds ; Porosity

Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Primary Batteries:702.1.1 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Colloid Chemistry:801.3 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2

2-s2.0-85090321235

Scopus

1.Energy and Electrochemical Interfaces Laboratory,Department of Mechanical and Automation Engineering,Faculty of Engineering,The Chinese University of Hong Kong,Shatin,N.T. 999077,China
2.Department of Chemistry,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China

Huang，Wei,Yu，Yikang,Hou，Zhen,et al. Dendrite-Free lithium electrode enabled by graphene aerogels with gradient porosity[J]. Energy Storage Materials,2020,33:329-335.

Huang，Wei.,Yu，Yikang.,Hou，Zhen.,Liang，Zhuojian.,Zheng，Yiyi.,...&Lu，Yi Chun.(2020).Dendrite-Free lithium electrode enabled by graphene aerogels with gradient porosity.Energy Storage Materials,33,329-335.

Huang，Wei,et al."Dendrite-Free lithium electrode enabled by graphene aerogels with gradient porosity".Energy Storage Materials 33(2020):329-335.