Gradient nano-recipes to guide lithium deposition in a tunable reservoir for anode-free batteries

Li，Zhiqiang1,2; Huang，Xinglong1; Kong，Long1; Qin，Ning1,2; Wang，Zhenyu1,2; Yin，Lihong1; Li，Yingzhi1,2; Gan，Qingmeng1,2; Liao，Kemeng1,2; Gu，Shuai1,2; Zhang，Tengfei1; Huang，He1,2; Wang，Lina1; Luo，Guangfu1; Cheng，Xing1; Lu，Zhouguang1,2

2022-03-01

10.1016/j.ensm.2021.11.037

Energy Storage Materials   影响因子和分区

2405-8297

2405-8297

Anode-free batteries (AFBs) have the potential of ultra-high energy density, but lithium dendrite has largely hindered their practical applications. In this work, an in-situ grown gradient solid electrolyte interface (SEI) layer on pre-designed micro-hole-grid (MHG) Cu reservoir is proposed to guide uniform lithium deposition and propagation, by which the electrode interface is stabilized and the surface stress is considerably decreased endowing the AFBs with outstanding areal capacity and cycling performance. The gradient SEI is confirmed by cryogenic-transmission electron microscopy (Cryo-TEM) and XPS to be composed of (1) an elastic organic top layer to hinder non-Li species migration and withstand volume fluctuation, and (2) a lithophilic LiCl-rich bottom layer to render the rapid lithium supply. Operando electron paramagnetic resonance (EPR) shows a dynamic Li deposition, unambiguously demonstrating a dendrites-free behavior. As a result, the full cells of a gradient SEI modified Cu reservoir paired with a LiFePO cathode exhibit high capacity of 95 mAh g and Coulombic efficiency (CE) of 99.5% after 100 cycles, much better than the control cells with planar current collectors (1.6 mAh g, 2.6%). These findings are enlightening in engineering better interphases for high energy and safe rechargeable lithium metal batteries.

Anode-free lithium batteries Concentration gradient cryo-TEM Electron paramagnetic resonance Solid electrolyte interface

SCI ; EI

英语

第一 ; 通讯

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20200109141640095] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001] ; National Natural Science Foundation of China[21875097]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000820166400005

ELSEVIER

20214911283560

Anodes ; Copper ; Deposition ; Electron resonance ; Electron spin resonance spectroscopy ; High resolution transmission electron microscopy ; Iron compounds ; Lithium compounds ; Lithium-ion batteries ; Paramagnetism ; Seebeck effect ; Solid electrolytes

Copper:544.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Electron Tubes:714.1 ; Optical Devices and Systems:741.3 ; Chemistry:801 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803

2-s2.0-85120486875

Scopus

1.Department of Materials Science and Engineering,Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China

Li，Zhiqiang,Huang，Xinglong,Kong，Long,et al. Gradient nano-recipes to guide lithium deposition in a tunable reservoir for anode-free batteries[J]. Energy Storage Materials,2022,45:40-47.

Li，Zhiqiang.,Huang，Xinglong.,Kong，Long.,Qin，Ning.,Wang，Zhenyu.,...&Lu，Zhouguang.(2022).Gradient nano-recipes to guide lithium deposition in a tunable reservoir for anode-free batteries.Energy Storage Materials,45,40-47.

Li，Zhiqiang,et al."Gradient nano-recipes to guide lithium deposition in a tunable reservoir for anode-free batteries".Energy Storage Materials 45(2022):40-47.