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Electricity generation from flowing water has been developed for over a century and plays a critical role in our lives. Generally, heavy and complex facilities are required for electricity generation, while using these technologies for applications that require a small size and high flexibility is difficult. Here, we developed a fluidic nanogenerator fiber from an aligned carbon nanotube sheet to generate electricity from any flowing water source in the environment as well as in the human body. The power conversion efficiency reached 23.3 %. The fluidic nanogenerator fiber was flexible and stretchable, and the high performance was well-maintained after deformation over 1 000 000 cycles. The fiber also offered unique and promising advantages, such as the ability to be woven into fabrics for large-scale applications. [ABSTRACT FROM AUTHOR]

A shape-memory, fiber-shaped supercapacitor is developed by winding aligned carbon nanotube sheets on a shape-memory polyurethane substrate. Despite its flexibility and stretchability, the deformed shapes under bending and stretching can be "frozen" as expected and recovered to the original state when required. Its electrochemical performances are well-maintained during deformation, at the deformed state and after the recovery. [ABSTRACT FROM AUTHOR]

An aligned and laminated sulfur-absorbed mesoporous carbon/carbon nanotube (CNT) hybrid cathode has been developed for lithium-sulfur batteries with high performance. The mesoporous carbon acts as sulfur host and suppresses the diffusion of polysulfide, while the CNT network anchors the sulfur-absorbed mesoporous carbon particles, providing pathways for rapid electron transport, alleviating polysulfide migration and enabling a high flexibility. The resulting lithium-sulfur battery delivers a high capacity of 1226 mAh g−1 and achieves a capacity retention of 75 % after 100 cycles at 0.1 C. Moreover, a high capacity of nearly 900 mAh g−1 is obtained for 20 mg cm−2, which is the highest sulfur load to the best of our knowledge. More importantly, the aligned and laminated hybrid cathode endows the battery with high flexibility and its electrochemical performances are well maintained under bending and after being folded for 500 times. [ABSTRACT FROM AUTHOR]

A novel wearable supercapacitor textile with the desired and combined properties of being thin, lightweight, transparent, and flexible is developed by stacking two aligned carbon nanotube fiber‐based textile electrodes. The supercapacitor textile is further integrated to create a new energy textile that can convert solar energy to electric energy, in addition to storing it with a high entire photoelectric conversion and storage efficiency. [ABSTRACT FROM AUTHOR]

Perovskite solar cells have triggered a rapid development of new photovoltaic devices because of high energy conversion efficiencies and their all-solid-state structures. To this end, they are particularly useful for various wearable and portable electronic devices. Perovskite solar cells with a flexible fiber structure were now prepared for the first time by continuously winding an aligned multiwalled carbon nanotube sheet electrode onto a fiber electrode; photoactive perovskite materials were incorporated in between them through a solution process. The fiber-shaped perovskite solar cell exhibits an energy conversion efficiency of 3.3%, which remained stable on bending. The perovskite solar cell fibers may be woven into electronic textiles for large-scale application by well-developed textile technologies. [ABSTRACT FROM AUTHOR]

Electrically conducting wires play a critical role in the advancement of modern electronics and in particular are an important key to the development of next-generation wearable microelectronics. However, the thin conducting wires can easily break during use, and the whole device fails to function as a result. Herein, a new family of high-performance conducting wires that can self-heal after breaking has been developed by wrapping sheets of aligned carbon nanotubes around polymer fibers. The aligned carbon nanotubes offer an effective strategy for the self-healing of the electric conductivity, whereas the polymer fiber recovers its mechanical strength. A self-healable wire-shaped supercapacitor fabricated from a wire electrode of this type maintained a high capacitance after breaking and self-healing. [ABSTRACT FROM AUTHOR]

Novel wire‐shaped polymer solar cells that have high performance are developed by introducing a thin layer of titania nanoparticles that increases the charge separation and transport and an aligned carbon nanotube fiber electrode that increases their stability. These solar cell wires are easily woven into flexible clothes that serve as lightweight and deformable power sources for portable electronic devices. [ABSTRACT FROM AUTHOR]

A wire-shaped energy device that can perform photoelectric conversion and electrochemical storage was developed through a simple but effective twisting process. The energy wire exhibited a high energy conversion efficiency of 6.58 % and specific capacitance of 85.03 μF cm−1 or 2.13 mF cm−2, and the two functions were alternately realized without sacrificing either performance. [ABSTRACT FROM AUTHOR]

A new and general method to produce flexible, wearable dye-sensitized solar cell (DSC) textiles by the stacking of two textile electrodes has been developed. A metal-textile electrode that was made from micrometer-sized metal wires was used as a working electrode, while the textile counter electrode was woven from highly aligned carbon nanotube fibers with high mechanical strengths and electrical conductivities. The resulting DSC textile exhibited a high energy conversion efficiency that was well maintained under bending. Compared with the woven DSC textiles that are based on wire-shaped devices, this stacked DSC textile unexpectedly exhibited a unique deformation from a rectangle to a parallelogram, which is highly desired in portable electronics. This lightweight and wearable stacked DSC textile is superior to conventional planar DSCs because the energy conversion efficiency of the stacked DSC textile was independent of the angle of incident light. [ABSTRACT FROM AUTHOR]

Superstretch: Einen Superkondensator mit sehr guter Dehnbarkeit liefert das Aufwickeln von zwei Blättern aus ausgerichteten Kohlenstoffnanoröhren, die als zwei Elektroden fungieren, auf eine elastische Faser. Mit diesen Blättern wird eine hohe Flexibilität, Dehnungsfestigkeit, elektrische Leitfähigkeit und mechanische wie thermische Stabilität erreicht. Der Superkondensator behält seinen hohe spezifische Kapazität auch nach mehreren Dehnzyklen bei. [ABSTRACT FROM AUTHOR]

Abstract: To investigate whether stem cell transplantation affects ventricular electrophysiology in vivo, either autologous bone marrow mesenchymal stem cells or skeletal myoblast cells were transplanted via a catheter into a doxorubicin-treated failing heart. Four weeks after transplantation, electrophysiological investigation showed that transplantation of either cell type prolonged the local activation time and increased the activation time dispersion. In the stem cell transplantation groups, a positive correlation was demonstrated between activation time dispersion and the number of stem cell-derived cells in the pacing site. It is concluded that transplantation of either mesenchymal stem cells or skeletal myoblast cells might exacerbate abnormalities of local ventricular conduction in the doxorubicin-treated failing heart. [Copyright &y& Elsevier]