我们提出了通过将阴极灯丝和阳极灯丝缠绕在一起来组装纤维状锂离子电池。阴极灯丝通过将LiFePO 4（LFP）复合层沉积到钢填充聚酯导电线（SPCT）上来制造。作为阳极丝，我们提出了几种方案，包括Li 4 Ti 5 O 12（LTO）复合涂层SPCT（浸渍和干燥沉积），锡涂层SPCT（PVD沉积）以及裸锡线。然后，在电池组件之前，将由LiPF 6和聚环氧乙烷（PEO）组成的电解质复合材料层沉积到阳极和阴极细丝两者上。通过使用定制的夹具将阴极灯丝和阳极灯丝缠绕在一起，然后组装电池。发现使用LTO@SPCT阳极的电池的开路电压为~ 2.3V，使用锡@SPCT阳极和锡线阳极的电池的开路电压为~ 3.3V。对于每个电池样品，在不同的C速率下进行充电-放电测试。实验结果表明，当以0.5-C速率充放电时，使用LTO@SPCT阳极、锡@SPCT阳极和裸锡丝阳极的LIB可以分别实现约64、约67和约96 mAh/g的比容量。电池在80次充放电循环后仍能保持良好的容量。在本文所报道的所有电池的运行过程中，它们的库仑效率保持在80%以上。所提出的LIB的优点是重量轻、易于制造、高比电容、高能量密度和良好的耐久性。最后，我们的电池采用廉价且市售的钢填充聚酯线作为基础材料，使它们可能适合使用各种标准纺织品制造技术集成到可穿戴设备中。
英文摘要：
We propose fabrication of the fiber-shaped lithium ion batteries assembled by twisting a cathode filament together with an anode filament. The cathode filament is fabricated by depositing a LiFePO4 (LFP)-composite layer onto a steel-filled polyester conductive thread (SPCT). As anode filaments, we propose several scenarios including a Li4Ti5O12 (LTO)-composite coated SPCT (dip-and-dry deposition), a tin-coated SPCT (PVD deposition) as well as a bare tin wire. An electrolyte composite layer consisting of LiPF6 and polyethylene oxide (PEO) is then deposited onto both the anode and cathode filament before the battery assembly. By twisting the cathode filament and anode filament together using a customized jig, the batteries are then assembled. The open-circuit voltage is found to be ~ 2.3 V for the battery using the LTO@SPCT anode, and ~3.3 V for the battery using the tin@SPCT anode and the tin wire anode. Charge-discharge tests are carried out at different C rates for each battery sample. Experimental results suggest that the LIBs using the LTO@SPCT anode, the tin@SPCT anode and the bare tin wire anode could achieve a specific capacity of ~64, ~67, and ~96 mAh/g, respectively, when charge-discharged at 0.5-C rate. The battery could retain well its capacity after 80 charge-discharge cycles. During operation of all the batteries reported in this paper, their coulombic efficiency remained above 80%. Among the advantages of the proposed LIB are light weight, ease of fabrication, high specific capacitance, high energy density, and good durability. Finally, employing cheap and commercially-available steel-filled polyester threads as a base material in our batteries, makes them potentially suitable for integration into wearables using various standard textile manufacturing techniques.
High performing ionanofluid electrolyte with higher lithium salt concentration for safer lithium metal batteries
开发了一类新的具有更高锂盐浓度的高性能吡咯烷鎓阳离子基离子纳米流体电解质。电解质通过将咪唑鎓离子液体官能化的TiO 2纳米颗粒分散在低导电的0.6 M锂盐掺杂的N-烷基-N-丁基吡咯烷鎓双（三氟甲基磺酰基）酰亚胺（Pyr 14 TFSI）离子液体（IL）托管的电解质中形成。这些电解质的粘度，离子电导率和热性能进行了比较，以及研究0.2 M盐掺杂的Pyr 14 TFSI IL为基础的电解质。高度结晶的0.6 M锂盐溶解的IL基电解质逐渐成为无定形的增加分散的表面功能化的纳米粒子在it. the电解质的离子电导率显示出不寻常的粘度解耦特性，并在5.0重量%的纳米粒子分散它达到最大值，高于纯IL主机。与纯IL基电解质相比，离子纳米流体电解质还具有显著更高的锂离子迁移数值。具有最佳导电离子纳米流体电解质的Li/LiMn 2 O 4电池在25 ℃下在24 mA g-1的电流密度下提供约131 mAh g-1的放电容量，远高于在0.2 M Li盐解离的Pyr 14 TFSI电解质中获得的放电容量（87 mAh g-1）。离子纳米流体电解质和电极之间的优异界面相容性，如与纯IL基类似物相比，电池的优异的速率性能和出色的容量保持所示，进一步确立了这种优化的新开发的电解质用于更安全的LMB的巨大应用潜力。
Ultrasonic identification technique in recycling of lithium ion batteries
University of the Witwatersrand（威特沃特斯兰德大学）；Université de Tours（图尔大学）；Inserm Research Unit U1253: iBrain（法国国家健康与医学研究院U1253单元：iBrain）；Faculté de Médecine（医学院）；Moscow State University（莫斯科国立大学）
Beyond Lithium-Ion Batteries: Are Effective Electrodes Possible for Alkaline and Other Alkali Elements? Exploring Ion Intercalation in Surface-Modified Few-Layer Graphene and Examining Layer Quantity and Stages
