期刊
SMALL
卷 16, 期 37, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202001784
关键词
deeply discharge; charge; duplex Cu networks; high areal capacity; lithium metal anodes; sulfur-assisted formation
类别
资金
- National Nature Science Foundation of China [51872157]
- Area of Excellence [HKPolyU 1-ZE30]
- Shenzhen Technical Plan Project [KQJSCX20160226191136, JCYJ20170412170911187, JCYJ20170817161753629]
- Shenzhen Key Laboratory of Security Research of Power Batteries [ZDSYS201707271615073]
- Special Fund Project for Strategic Emerging Industry Development of Shenzhen [20170428145209110]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
- Guangdong Technical Plan Project [2015TX01N011, 2017B090907005]
- R&D Projects in Key Areas of Guangdong Province [2019B090908001]
Suppressing the dendrite formation and managing the volume change of lithium (Li) metal anode have been global challenges in the lithium batteries community. Herein, a duplex copper (Cu) foil with an ant-nest-like network and a dense substrate is reported for an ultrastable Li metal anode. The duplex Cu is fabricated by sulfurization of thick Cu foil with a subsequent skeleton self-welding procedure. Uniform Li deposition is achieved by the 3D interconnected architecture and lithiophilic surface of self-welded Cu skeleton. The sufficient space in the porous layer enables a large areal capacity for Li and significantly improves the electrode-electrolyte interface. Simulations reveal that the structure allows proper electric field penetration into the connected tunnels. The assembled Li anodes exhibit high coulombic efficiency (97.3% over 300 cycles) and long lifespan (>880 h) at a current density of 1 mA cm(-2)with a capacity of 1 mAh cm(-2). Stable and deep cycling can be maintained up to 50 times at a high capacity of 10 mAh cm(-2).
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