scholarly journals Karakteristik Mineral Grafit Daerah Samaturu, Kabupaten Kolaka, Provinsi Sulawesi Tenggara

2021 ◽  
Vol 4 (2) ◽  
pp. 72-82
Author(s):  
Khalifa Akbar ◽  
Hasria Hasria ◽  
Suryawan Asfar
Keyword(s):  
Lithium Ion ◽  
Flake Graphite

Mineral grafit merupakan salah satu bentukan dari unsur karbon. Mineral grafit memiliki banyak kegunaan dalam bidang teknologi, salah satunya pada baterai lithium ion yang sedang dikembangkan di Indonesia. Penggunaan mineral grafit semakin meningkat pada industri teknologi di dunia termasuk di Indonesia, namun mineral grafit di Indonesia masih harus diimpor dari luar negeri. Selain itu, mineral grafit memiliki kisaran harga jual 1.550-2.800 USD/ton untuk tipe vein, 700-10.000 USD/ton untuk tipe flake, dan 430-550 USD/ton untuk tipe amorf. Berdasarkan hal inilah eksplorasi mineral grafit di Indonesia perlu dilakukan. Penelitian ini bertujuan untuk mengetahui batuan yang mengandung mineral grafit beserta karakteristik dan sebaran mineral grafit di daerah penelitian Penelitian ini dilakukan di daerah Samaturu, karena mineral grafit dapat ditemukan pada Kompleks Malihan Paleozoikum. Metode penelitian yang digunakan yaitu pengamatan megaskopis, petrografi dan analisis SEM-EDS. Batuan yang dijumpai mengandung mineral grafit yaitu satuan litologi sekis muskovit yang memiliki persen karbon yang beragam. Mineral grafit yang dijumpai di daerah penelitian memiliki karaktersitik yaitu merupakan grafit natural yang kristalin, bentuk pipih dan saling mengikat, terbentuk oleh metamorfisme regional, tidak teratur pada hinge lipatan sehingga diketahui bahwa mineral grafit di daerah penelitian termasuk dalam tipe endapan flake graphite (grafit serpih).

Synergistic effect between flake graphite and small-sized graphene in lithium storage

2021 ◽  
pp. 2150031
Author(s):  
Hai Li ◽  
Chunxiang Lu
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Individual Component ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Flake Graphite ◽  
Effective Strategy ◽  
Lithium Storage

As anode material for lithium-ion batteries, graphite has the disadvantage of relatively low specific capacity. In this work, a simple yet effective strategy to overcome the disadvantages by using a composite of flake graphite (FG) and small-sized graphene (SG) has been developed. The FG/SG composite prepared by dispersing FG and SG (90:10 w/w) in ethanol and drying delivers much higher specific capacity than that of individual component except for improved rate capability. More surprisingly, FG/SG composite delivers higher reversible capacity than its theoretical value calculated according to the theoretical capacities of graphite and graphene. Therefore, a synergistic effect between FG and SG in lithium storage is clearly discovered. To explain it, we propose a model that abundant nanoscopic cavities were formed due to physical adhesion between FG and SG and could accommodate extra lithium.

scholarly journals Irreversibility at macromolecular scales in the flake graphite of the lithium-ion battery anode

2019 ◽  
Vol 436 ◽  
pp. 226841 ◽  
Author(s):  
Jared J. Lodico ◽  
Chun-Han Lai ◽  
Mark Woodall ◽  
Ho Leung Chan ◽  
Erick Garcia ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Flake Graphite ◽  
Battery Anode

scholarly journals Enhancement of Electrochemical Stability about Silicon/Carbon Composite Anode Materials for Lithium Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Xiao ◽  
Chang Miao ◽  
Xuemin Yan ◽  
Qing Sun ◽  
Ping Mei
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Anode Materials ◽  
Phenolic Resin ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
Flake Graphite ◽  
Composite Anode ◽  
Charge Capacity ◽  
Silicon Carbon

Silicon/carbon (Si/C) composite anode materials are successfully synthesized by mechanical ball milling followed by pyrolysis method. The structure and morphology of the composite are characterized by X-ray diffraction and scanning electron microscopy and transmission electron microscope, respectively. The results show that the composite is composed of Si, flake graphite, and phenolic resin-pyrolyzed carbon, and Si and flake graphite are enwrapped by phenolic resin-pyrolyzed carbon, which can provide not only a good buffering matrix but also a conductive network. The Si/C composite also shows good electrochemical stability, in which the composite anode material exhibits a high initial charge capacity of 805.3 mAh g−1at 100 mA g−1and it can still deliver a high charge capacity of 791.7 mAh g−1when the current density increases to 500 mA g−1. The results indicate that it could be used as a promising anode material for lithium ion batteries.

Self-Assembled Porous NiFe2 O4 Floral Microspheres Inlaid on Ultrathin Flake Graphite as Anode Materials for Lithium Ion Batteries

2017 ◽  
Vol 4 (12) ◽  
pp. 3148-3155 ◽  
Author(s):  
Lina Qu ◽  
Xianhua Hou ◽  
Xiyan Huang ◽  
Qian Liang ◽  
Qiang Ru ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Flake Graphite ◽  
Self Assembled

Silicon/flake graphite/carbon anode materials prepared with different dispersants by spray-drying method for lithium ion batteries

2013 ◽  
Vol 23 (5) ◽  
pp. 1413-1420 ◽  
Author(s):  
Jun LAI ◽  
Hua-jun GUO ◽  
Xiang-qun LI ◽  
Zhi-xing WANG ◽  
Xin-hai LI ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Spray Drying ◽  
Anode Materials ◽  
Lithium Ion ◽  
Carbon Anode ◽  
Flake Graphite ◽  
Drying Method

Preparation and characterization of flake graphite/silicon/carbon spherical composite as anode materials for lithium-ion batteries

2012 ◽  
Vol 530 ◽  
pp. 30-35 ◽  
Author(s):  
Jun Lai ◽  
Huajun Guo ◽  
Zhixing Wang ◽  
Xinhai Li ◽  
Xiaoping Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Flake Graphite ◽  
Silicon Carbon

Modified natural flake graphite with high cycle performance as anode material in lithium ion batteries

2009 ◽  
Vol 54 (15) ◽  
pp. 3930-3934 ◽  
Author(s):  
Lin Zou ◽  
Feiyu Kang ◽  
Yong-Ping Zheng ◽  
Wanci Shen
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Flake Graphite

Silicon, flake graphite and phenolic resin-pyrolyzed carbon based Si/C composites as anode material for lithium-ion batteries

2013 ◽  
Vol 24 (6) ◽  
pp. 921-925 ◽  
Author(s):  
Mingru Su ◽  
Zhixing Wang ◽  
Huajun Guo ◽  
Xinhai Li ◽  
Silin Huang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Phenolic Resin ◽  
Lithium Ion ◽  
Flake Graphite ◽  
Carbon Based

An excellent performance anode of ZnFe2O4/flake graphite composite for lithium ion battery

2014 ◽  
Vol 585 ◽  
pp. 398-403 ◽  
Author(s):  
Lingmin Yao ◽  
Xianhua Hou ◽  
Shejun Hu ◽  
Xiaoqin Tang ◽  
Xiang Liu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Flake Graphite ◽  
Excellent Performance ◽  
Graphite Composite
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