A sacrificial separator facilitating <i>in situ</i> creation of a durable CEI layer and tailoring lithium dendrites for practical lithium metal batteries

Park, Sung Joon; Choi, Yun Jeong; Cheon, Jaemun; Kim, Hyungjun; Lee, Jong-Won; Yim, Taeeun; Kim, Ki Jae

doi:10.1039/d4ta01234h

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01234h

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A sacrificial separator facilitating in situ creation of a durable CEI layer and tailoring lithium dendrites for practical lithium metal batteries

Sung Joon Park,

Yun Jeong Choi,

Jaemun Cheon

et al.

Abstract: A Li metal anode and NCM811 cathode are used to realize practical Li metal batteries (LMBs) with a high energy density. However, during repeated charging–discharging processes, the concurrent occurrence of...

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Addressing Fundamental Challenges of Si/Gr Electrodes with High Silicon Contents Using Innovative Bilayer Electrode Structure Design

Yoo,

Park,

Bak

et al. 2024

Small Structures

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The extremely high volume change of Si during alloying and dealloying in the charge/discharge process is a key challenge for increasing the Si content in Si/Gr electrodes. To address these fundamental challenges, a sophisticated bilayer Si/Gr electrode composed of an upper layer with a porous structure and a lower layer with a compact structure to increase the Si content while enhancing the long‐term cycling stability of the electrode is designed. The unique structure of the bilayer Si/Gr electrode is achieved by controlling the densities of the upper and lower electrode layers. The porous structure of the upper layer can accommodate the volume expansion of Si, thereby increasing the Si content of the Si/Gr electrode. The compact structure of the lower layer can suppress the delamination of the electrode by the volume expansion of Si due to its high binding strength with the current collector, thus ensuring the long‐term stability of the Si/Gr electrode. Consequently, because of the distinct features of the upper and lower layers in the bilayer Si/Gr electrode, superior cyclability is achieved despite an increase in the total Si content to 30 wt% in the Si/Gr electrode, with a specific capacity of 534.8 mAh g−1 after 100 cycles.

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Addressing Fundamental Challenges of Si/Gr Electrodes with High Silicon Contents Using Innovative Bilayer Electrode Structure Design

Yoo,

Park,

Bak

et al. 2024

Small Structures

View full text Add to dashboard Cite

show abstract

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A sacrificial separator facilitating in situ creation of a durable CEI layer and tailoring lithium dendrites for practical lithium metal batteries

Abstract: A Li metal anode and NCM811 cathode are used to realize practical Li metal batteries (LMBs) with a high energy density. However, during repeated charging–discharging processes, the concurrent occurrence of...

Cited by 1 publication

References 51 publications

Addressing Fundamental Challenges of Si/Gr Electrodes with High Silicon Contents Using Innovative Bilayer Electrode Structure Design

Addressing Fundamental Challenges of Si/Gr Electrodes with High Silicon Contents Using Innovative Bilayer Electrode Structure Design

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