500 Wh kg(-1)Class Li Metal Battery Enabled by a Self-Organized Core-Shell Composite Anode

Han, Bing1,2; Xu, Dongwei1; Chi, Shang-Sen1,3; He, Dongsheng1; Zhang, Zhen1; Du, Leilei1; Gu, Meng1; Wang, Chaoyang4; Meng, Hong2; Xu, Kang5; Zheng, Zijian3; Deng, Yonghong1

2020-09-15

10.1002/adma.202004793

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Lithium (Li) metal offers the highest projected energy density as a battery anode, however its extremely high reactivity induces dendrite growth and dead Li formation during repeated charge/discharge processes, resulting in both poor reversibility and catastrophic failure. Approaches reported to date often seek to suppress dendrites formation at the expense of energy density. Here, a strategy that resolves the above conflict and achieves a dendrite-free and long-term reversible Li metal anode is reported. A self-organized core-shell composite anode, comprising an outer sheath of lithiated liquid metal (LixLMy) and an inner layer of Li metal, is developed, which posesses high electrical and ionic conductivity, and physically separates Li from the electrolyte. The introduction of Li(x)LM(y)not only prevents dendrite formation, but also eliminates the use of copper as an inert substrate. Full cells made of such composite anodes and commercially available LiNi0.6Co0.2Mn0.2O2(NCM622) cathodes deliver ultrahigh energy density of 1500 Wh L(-1)and 483 Wh kg(-1). The high capacity can be maintained for more than 500 cycles, with fading rate of less than 0.05% per cycle. Pairing with LiNi0.8Co0.1Mn0.1O2(NCM811) further raises the energy density to 1732 Wh L(-1)and 514 Wh kg(-1).

composite electrodes energy density energy storage Li metal batteries liquid metals

SCI ; EI

英语

NI期刊 ; NI论文

第一 ; 通讯

Key-Area Research and Development Program of Guangdong Province, China[2020B090919001][2019B090908001]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000569139200001

WILEY-V C H VERLAG GMBH

20203809199788

Anodes ; Manganese compounds ; Cobalt compounds ; Nickel compounds ; Liquid metals ; Lithium batteries ; Lithium compounds ; Electrolytes

Metallurgy:531.1 ; Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Electric Batteries and Fuel Cells:702 ; Primary Batteries:702.1.1 ; Electron Tubes:714.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China
3.Hong Kong Polytech Univ, Inst Text & Clothing, Res Ctr Smart Wearable Technol, Lab Adv Interfacial Mat & Devices, Hong Kong 999077, Hong Kong, Peoples R China
4.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
5.US Army, Energy Storage Branch, Sensors & Elect Devices Directorate, Res Lab, 2800 Powder Mill Rd, Adelphi, MD 20783 USA

Han, Bing,Xu, Dongwei,Chi, Shang-Sen,et al. 500 Wh kg(-1)Class Li Metal Battery Enabled by a Self-Organized Core-Shell Composite Anode[J]. ADVANCED MATERIALS,2020,32(42).

Han, Bing.,Xu, Dongwei.,Chi, Shang-Sen.,He, Dongsheng.,Zhang, Zhen.,...&Deng, Yonghong.(2020).500 Wh kg(-1)Class Li Metal Battery Enabled by a Self-Organized Core-Shell Composite Anode.ADVANCED MATERIALS,32(42).

Han, Bing,et al."500 Wh kg(-1)Class Li Metal Battery Enabled by a Self-Organized Core-Shell Composite Anode".ADVANCED MATERIALS 32.42(2020).