کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6470765 | 1424112 | 2017 | 8 صفحه PDF | دانلود رایگان |
As lithium-ion batteries (LIBs) find application in new fields, the specific capacity of single LIBs must be enhanced, and the backward-cell problem in battery modules must be solved. Here, Mn3O4 and carbon nanofragment (Mn3O4/CNF) composites are synthesized and shown to have higher capacities than commercial graphite (theoretical capacity of approximately 372 mAh·gâ1) and hierarchical voltage plateaus. Nanosized Mn3O4 particles are introduced into the CNFs to simultaneously increase the specific capacity and prevent the corresponding LIB modules from over-discharging. The Mn2+-modified CNFs are spray-dried and calcined to form Mn3O4/CNF composites with 1.62%, 3.21%, and 6.74% Mn, which exhibit enhanced reversible specific capacities of 486.1, 609.3, and 539.0 mAh·gâ1, respectively, at 0.1C after 100 cycles. Furthermore, the additional voltage plateau at 1.2 V due to Mn3O4 can help prevent the corresponding LIB modules from over-discharging and metallic lithium deposition on the anode.
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Journal: Electrochimica Acta - Volume 245, 10 August 2017, Pages 448-455