Copper foil maker Londian Wason New Energy Tech was valued at $2.01 billion in its New York Stock Exchange debut on Wednesday, marking the largest IPO of a Chinese company in the U.S. in more than a year.The Shenzhen-based company's ?shares opened ?at $26 ?apiece, above their offer price of $22, after it raised $94.3 million in Tuesday's upsized offering.Chinese IPOs ?in the United States have dwindled in recent years amid escalating tensions between Washington ?and Beijing and increased scrutiny of China-based issuers."Offerings with very low floats like this one tend to be more volatile and can benefit ?from a…