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![1: Illustration of a lithium-ion cell. The arrows given in the figure indicate the flow of electrons and lithium ions during charge and discharge of the cell [13].](profile/Benedicte-Eikeland-Nilssen-2/publication/334094319/figure/fig2/AS:774777467842562@1561732751180/Illustration-of-a-lithium-ion-cell-The-arrows-given-in-the-figure-indicate-the-flow-of.jpg)
1: Illustration of a lithium-ion cell. The arrows given in the figure indicate the flow of electrons and lithium ions during charge and discharge of the cell [13].
Source publication
Conductive carbon additives are important constituents of the current state-of-the-art Li-ion battery cathodes, as the traditional active cathode materials are characterized by too low electronic conductivities. In high-voltage Li-ion batteries, these additives are subject for anion intercalation and electrolyte oxidation, which might cause changes...
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Citations
... Pada umumnya, beragam bahan karbon konduktif digunakan dalam baterai ion litium sebagai aditif konduktif [17][18][19]. Bahan karbon yang digunakan telah diolah sehingga sangat halus, memiliki luas permukaan yang tinggi, porositas yang tinggi bahkan dengan struktur dan morfologi tertentu. Jenis bahan karbon yang khas dan mutakhir adalah carbon nanotubes (CNT) dan graphene [20][21][22][23][24][25]. ...
Kajian teknologi bahan baterai ion litium ditujukan untuk mempelajari pengaruh bahan berkonduktivitas listrik yang tinggi, struktur bahan dan konstruksi komposit terhadap peningkatan secara nyata unjuk kerja baterai ion litium. Strategi intrinsik dan ekstrinsik dapat ditempuh untuk mencapai tujuan ini. Perkembangan teknologi secara umum menunjukkan kecenderungan bahwa rekayasa bahan aktif bermorfologi memanjang, penggunaan karbon khusus seperti carbon nanotubes dan graphene, dan nanokomposit memberikan dampak nyata terhadap unjuk kerja baterai ion litium.Kata kunci : baterai ion litium, konduktivitas listrik
The sluggish electrochemical kinetics of sulfur species has impeded the wide adoption of lithium-sulfur battery, which is one of the most promising candidates for next-generation energy storage system. Here, we present the electronic and geometric structures of all possible sulfur species and construct an electronic energy diagram to unveil their reaction pathways in batteries, as well as the molecular origin of their sluggish kinetics. By decoupling the contradictory requirements of accelerating charging and discharging processes, we select two pseudocapacitive oxides as electron-ion source and drain to enable the efficient transport of electron/Li+ to and from sulfur intermediates respectively. After incorporating dual oxides, the electrochemical kinetics of sulfur cathode is significantly accelerated. This strategy, which couples a fast-electrochemical reaction with a spontaneous chemical reaction to bypass a slow-electrochemical reaction pathway, offers a solution to accelerate an electrochemical reaction, providing new perspectives for the development of high-energy battery systems. The sluggish electrochemical kinetics of sulfur species remains a major hurdle for the broad adoption of lithium-sulfur batteries. Here, the authors construct an energy diagram of sulfur species to unveil their reaction pathways and propose a general strategy to accelerate electrochemical reactions.
