If I understood this correctly, we had good data from other studies supporting that this method (probably) works, it's the actually doing it that is the challenge. And of course one study is just one study.
I'm glad such progress is being made, although I don't see an actual verifiable report of the impressive claims for this patient. The linked paper doesn't discuss the report, and no other references to this patient appear to exist from the article.
I've read too many truly impressive reports from Chinese researchers this year that I feel extra need to take such reports with a grain of salt. If I had a dollar for every claim that we've just made a major advancement in battery technology that will replace lithium-ion from a Chinese university...