TY - JOUR
T1 - Study of Fast Catalytic Conversion of Polysulfides by Porous N-Co3O4 Nanocages Embedded with rGONR/CNT Composite for High-Rate Li2S-Based Lithium Sulfur Batteries
AU - Deivendran, Gokul Raj
AU - Seenivasan, Manojkumar
AU - Wu, Yi Shiuan
AU - Chang, Jeng Kuei
AU - Jose, Rajan
AU - Poddar, Mrinal
AU - Sun, Chia Liang
AU - Yang, Chun Chen
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/9/30
Y1 - 2024/9/30
N2 - Lithium sulfide (Li2S)-based batteries are considered promising alternative sources for intercalation-type lithium-ion batteries because of their high theoretical capacity. However, the practical application of Li2S is limited by two major issues: the dissolution of polysulfides (PSs) and the poor electronic conductivity of the Li2S cathode materials. To tackle these problems, the as-prepared 3D porous cobalt oxide nanocages (N-Co3O4) were embedded with a two-dimensional (2D) graphene oxide nanoribbon (rGONR) and a one-dimensional (1D) carbon nanotube (CNT) carbon matrix to form N-Co3O4/rGONR/CNT (N-Co3O4/C) double-shelled metal-carbon composites. This study uses the infiltration-evaporation method to incorporate Li2S into the porous nanocage carbon structure (N-Co3O4/C) as a sulfur host material. This interconnected metal-carbon matrix design offered good electron conductivity (∼3.51 × 10-3 S cm-1), high diffusion coefficients, suitable surface area, and pore size (2 to 14 nm) for PS confinement. Our porous N-Co3O4 filler synergistically immobilized PSs inside the cathode via chemisorption, impeding the shuttle effect in LSBs. In situ XRD analysis reveals that the designed N-Co3O4/C with a spinel-based structure as a catalyst facilitates Li2S conversion with minimal polarization in the first cycle. The advantages of the as-fabricated Li2S-N-Co3O4/rGONR/CNT composite cathode delivered a high initial specific capacity of 1004 mA h g-1 at 0.1C and 413 mAh g-1 on the 1000th cycle at 3C, demonstrating good retention capability. Therefore, the N-Co3O4/C-modified composite cathode shows excellent electrochemical performance, implying that LSBs offer promising practical applications in high-performance energy storage devices.
AB - Lithium sulfide (Li2S)-based batteries are considered promising alternative sources for intercalation-type lithium-ion batteries because of their high theoretical capacity. However, the practical application of Li2S is limited by two major issues: the dissolution of polysulfides (PSs) and the poor electronic conductivity of the Li2S cathode materials. To tackle these problems, the as-prepared 3D porous cobalt oxide nanocages (N-Co3O4) were embedded with a two-dimensional (2D) graphene oxide nanoribbon (rGONR) and a one-dimensional (1D) carbon nanotube (CNT) carbon matrix to form N-Co3O4/rGONR/CNT (N-Co3O4/C) double-shelled metal-carbon composites. This study uses the infiltration-evaporation method to incorporate Li2S into the porous nanocage carbon structure (N-Co3O4/C) as a sulfur host material. This interconnected metal-carbon matrix design offered good electron conductivity (∼3.51 × 10-3 S cm-1), high diffusion coefficients, suitable surface area, and pore size (2 to 14 nm) for PS confinement. Our porous N-Co3O4 filler synergistically immobilized PSs inside the cathode via chemisorption, impeding the shuttle effect in LSBs. In situ XRD analysis reveals that the designed N-Co3O4/C with a spinel-based structure as a catalyst facilitates Li2S conversion with minimal polarization in the first cycle. The advantages of the as-fabricated Li2S-N-Co3O4/rGONR/CNT composite cathode delivered a high initial specific capacity of 1004 mA h g-1 at 0.1C and 413 mAh g-1 on the 1000th cycle at 3C, demonstrating good retention capability. Therefore, the N-Co3O4/C-modified composite cathode shows excellent electrochemical performance, implying that LSBs offer promising practical applications in high-performance energy storage devices.
KW - LiS-based cathode
KW - carbon nanotube
KW - low activation potential
KW - polysulfide immobilizer
KW - porous cobalt oxide nanocages
UR - http://www.scopus.com/inward/record.url?scp=85205677014&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.4c06510
DO - 10.1021/acssuschemeng.4c06510
M3 - 文章
AN - SCOPUS:85205677014
SN - 2168-0485
VL - 12
SP - 14553
EP - 14567
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 39
ER -