The fast development of optoelectronics makes a huge boost to the searching for flexible indium-free transparent conductors. In recent years, metal networks (currently are Au, Ag and Cu) have emerged as promising alternatives, however, facile fabrication of high-performance, chemically stable, and low-cost transparent conductor is still a big challenge. Here, ultra-long W microfibers (with conductivity of 4.3×10⁴ S/cm) are successfully produced by draw spinning and further assembled into well-regulated patterns. Such a solution-processed patterning effectively eliminates the fiber-to-fiber joint resistance, and thus enables the W network to achieve an ultra-low sheet resistance of 0.2 Ω sq^-1 at ∼90% transparency, which corresponds to a high figure of merit σ_dc/σ_opt=1.7×10⁴ (up to 10-40 times the value of Cu and Au networks). Moreover, the W network possesses excellent anti-thermal and anti-corrosion properties, which enable it to work in the erosion solution with pH ranging from 1 to 13 with a restrained increase (<3%) in its sheet resistance. With a marvelous combination of high conductivity and transparency, high chemical stability and good mechanical flexibility, the ultrathin W fibers may open a new door to find flexible indium-free transparent conductors for the development of both flexible electronics and energy conversion.

光电子学的快速发展极大地推动了对柔性无铟透明导体的寻求。近年来，金属网络（目前是Au，Ag和Cu）已经成为有前途的替代品，但是，如何轻松制造高性能，化学稳定且低成本的透明导体仍然是一大挑战。在此，通过拉伸纺丝成功地生产了超长W微纤维（电导率为4.3×10 ⁴ S / cm），并进一步组装成规则的图案。这种固溶处理的构图有效地消除了纤维间的连接电阻，从而使W网络在〜90％的透明性下实现了0.2Ωsq ^-1的超低薄层电阻，这对应于较高的优值σ_直流/σ_选择= 1.7×10 ⁴（高达10-40倍Cu和Au中网络的值）。而且，W网络具有出色的抗热和抗腐蚀性能，使其能够在pH范围为1至13的腐蚀溶液中工作，并且其薄层电阻受到抑制（<3％）。凭借高导电率和透明性，高化学稳定性和良好的机械柔韧性的奇妙组合，超薄W纤维可能会为寻找用于开发柔性电子和能量转换的柔性无铟透明导体打开新的大门。