Sang-Ick Lee

Solid-state microwave irradiation synthesis of high quality graphene nanosheets under hydrogen containing atmosphere

High quality graphene nanosheets were fabricated within 1 min by solid-state microwave irradiation of a mixture of graphite oxide and graphene nanosheets under a hydrogen atmosphere. The graphene nanosheets in the mixture acted as an effective microwave susceptor under microwave irradiation synthesis, and could provide sufficiently rapid heating for the effective exfoliation of graphite oxide. A hydrogen containing atmosphere played important roles in improving the quality of the graphene nanosheets by increasing the level of reduction and preventing the formation of defects in the graphene nanosheets. The graphene nanosheets thus obtained exhibited a specific surface area of 586 m2 g−1 and an outstanding carbon/oxygen ratio of 18.5.

A Study on the H3PO4-Treated Soft Carbon as Anode Materials for Lithium Ion Batteries

코크스와 인산을 혼합한 뒤

Contrast structure and EDLC performances of activated spherical carbons with medium and large surface areas

900^{\circ}C

Spray-Assisted Deep-Frying Process for the In Situ Spherical Assembly of Graphene for Energy-Storage Devices

에서 열처리하여 제조한 소프트카본의 구조적 특성 변화와 리튬이온전지용 음극 소재로서의 전기화학적 특성을 평가하였다. 입자 단면의 EDS 분석으로 phosphorus는 입자 내부에 전체적으로 존재하기는 하나 표면에 편재해 있었으며,

Self-assembly of Si entrapped graphene architecture for high-performance Li-ion batteries

PO_x

High-voltage electric double layer capacitor

(0

Electrochemical Characterization of Phosphorous-doped Soft Carbon using Single Particle for Lithium Battery Anode

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Increasing reversible capacity of soft carbon anode by phosphoric acid treatment

4)의 결합 형태로 존재하고 있음을 XPS 분석을 통해 확인하였다. 인산 처리한 소프트카본의 방전 용량은

고출력 특성을 가진 전기화학소자

390mAh\;g^{-1}

Electrochemical device having high power properties

이상으로 인산을 처리하지 않은 소프트카본(