TY - JOUR
T1 - Dual-Carbon Engineering of Nanosized (Ni0.28Co0.72)1-xS for Li+ Storage with Enhanced Rate Capability and Stability
AU - Yu, Cuiping
AU - Xia, Chenhong
AU - Wang, Yan
AU - Zhang, Jianfang
AU - Cui, Jiewu
AU - Zhang, Yong
AU - Tan, Hark Hoe
AU - Tiwary, Chandra Sekhar
AU - Lv, Jun
AU - Wu, Yucheng
N1 - Publisher Copyright:
© 2023 American Chemical Society
PY - 2023/6/23
Y1 - 2023/6/23
N2 - The poor conductivity and large volume swelling of transition-metal sulfides are still big challenges to overcome for high-performance energy storage. Herein, the flexibility of MOF precursors offers remarkable versatility in tailoring the chemical composition of NiCo sulfides with a highly desirable porous structure, and then dual-carbon-confined (Ni0.28Co0.72)1-xS nanoparticles are designed, in which an inner sulfur-doped porous carbon (SC) matrix (derived from the organic ligands of metal-organic frameworks (MOFs)) and an outer wrapped S-doped reduced graphene oxide (SG)-co-engineered (Ni0.28Co0.72)1-xS are constructed ((Ni0.28Co0.72)1-xS/SC/SG)) to enhance the rate capability and stability of Li+ storage. For the dual carbons, the inner SC can elastically realize the anti-aggregation of nanosized (Ni0.28Co0.72)1-xS and improve their conductivity, while the outer SG could further promote the reaction kinetics, stabilize the structure, and ensure the structural integrity. As expected, the optimized (Ni0.28Co0.72)1-xS/SC/0.7SG exhibits an outstanding rate capability of 640.1 mAh g-1 at 5.0 A g-1 and ultrahigh cycling stability of 134.7% at 1 A g-1 after 1000 cycles. The assembled lithium-ion capacitor (LIC) also shows a high energy density of 125.8 Wh kg-1 at the power density of 200 W kg-1, as well as excellent stability (98.8% after 6000 cycles). This work highlights the significance of dual-carbon engineering in enhancing the energy storage performance of active materials, and the fabricated nanosized (Ni0.28Co0.72)1-xS by dual-carbon engineering can be applied in high-performance electrochemical energy storage and beyond.
AB - The poor conductivity and large volume swelling of transition-metal sulfides are still big challenges to overcome for high-performance energy storage. Herein, the flexibility of MOF precursors offers remarkable versatility in tailoring the chemical composition of NiCo sulfides with a highly desirable porous structure, and then dual-carbon-confined (Ni0.28Co0.72)1-xS nanoparticles are designed, in which an inner sulfur-doped porous carbon (SC) matrix (derived from the organic ligands of metal-organic frameworks (MOFs)) and an outer wrapped S-doped reduced graphene oxide (SG)-co-engineered (Ni0.28Co0.72)1-xS are constructed ((Ni0.28Co0.72)1-xS/SC/SG)) to enhance the rate capability and stability of Li+ storage. For the dual carbons, the inner SC can elastically realize the anti-aggregation of nanosized (Ni0.28Co0.72)1-xS and improve their conductivity, while the outer SG could further promote the reaction kinetics, stabilize the structure, and ensure the structural integrity. As expected, the optimized (Ni0.28Co0.72)1-xS/SC/0.7SG exhibits an outstanding rate capability of 640.1 mAh g-1 at 5.0 A g-1 and ultrahigh cycling stability of 134.7% at 1 A g-1 after 1000 cycles. The assembled lithium-ion capacitor (LIC) also shows a high energy density of 125.8 Wh kg-1 at the power density of 200 W kg-1, as well as excellent stability (98.8% after 6000 cycles). This work highlights the significance of dual-carbon engineering in enhancing the energy storage performance of active materials, and the fabricated nanosized (Ni0.28Co0.72)1-xS by dual-carbon engineering can be applied in high-performance electrochemical energy storage and beyond.
KW - chemical composition optimizing
KW - cycling stability
KW - dual-carbon engineering
KW - nanosized (NiCo)S
KW - rate capability
UR - http://www.scopus.com/inward/record.url?scp=85163386847&partnerID=8YFLogxK
U2 - 10.1021/acsanm.3c01422
DO - 10.1021/acsanm.3c01422
M3 - Article
SN - 2574-0970
VL - 6
SP - 10477
EP - 10486
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 12
ER -